diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 54ab63d7c0..d88bbc6362 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -17,6 +17,19 @@
    past entries belonging to author(s): Viktor Szakats.
 */
 
+2009-07-11 18:50 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
+  * INSTALL
+    + Added OS/2 cross-build examples for both Windows and Linux
+      hosts (Thanks Przemek for the Linux one).
+    + Added information that DOS and OS/2 builds can be created
+      on other host OSes.
+
+  * config/os2/global.cf
+  * config/os2/install.cf
+    + Added support for non-bash non-OS/2 shell for
+      Windows NT cross compilation.
+    ! Fixed syntax error in one of the OS/2 specific rules.
+
 2009-07-11 18:16 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
   * config/os2/global.cf
     * Casing.
diff --git a/harbour/INSTALL b/harbour/INSTALL
index 16fa848a1d..eb110e140d 100644
--- a/harbour/INSTALL
+++ b/harbour/INSTALL
@@ -37,8 +37,8 @@ HOW TO BUILD AND INSTALL HARBOUR FROM SOURCE
       $ ./hello
       You should see 'Hello world!' on screen.
 
-   Windows
-   -------
+   Windows/Windows CE
+   ------------------
       Platform specific prerequisites:
 
       1.) Windows NT or compatible system is required to build Harbour.
@@ -68,7 +68,7 @@ HOW TO BUILD AND INSTALL HARBOUR FROM SOURCE
              - With mingw, sh.exe (part of MSYS) mustn't be in the PATH.
 
    Windows with MinGW + MSYS or Cygwin
-   -----------------------------------
+   ----------------------------------------------
 
       This is an *alternative build method* using bash script directly.
       For the primary and recommended method: see above
@@ -87,6 +87,8 @@ HOW TO BUILD AND INSTALL HARBOUR FROM SOURCE
 
    DOS
    ---
+      You can use MS-DOS or Windows NT compatible hosts to create DOS builds.
+
       > set HB_ARCHITECTURE=dos
       > set HB_COMPILER=<[djgpp]|watcom>
       > set HB_INSTALL_PREFIX=<DIR>
@@ -94,6 +96,10 @@ HOW TO BUILD AND INSTALL HARBOUR FROM SOURCE
 
    OS/2
    ----
+      You can use OS/2, Windows NT compatible, or Linux hosts to create
+      OS/2 builds.
+      Some tricks are required when non-OS/2 host is used, see in examples.
+
       > set HB_COMPILER=<[gcc]|watcom>
       > set HB_INSTALL_PREFIX=<DIR>
       > make_gnu_os2.cmd install
@@ -582,6 +588,44 @@ EXAMPLES
       call make_gnu_os2.cmd %1 %2 > log-%HB_COMPILER%.txt 2>&1
       ---
 
+      --- Open Watcom C++ on Windows NT (requires native Windows Harbour binaries)
+      SET WATCOM=C:\watcom
+      SET PATH=%WATCOM%\BINNT;%WATCOM%\BINW;%PATH%
+      SET BEGINLIBPATH=%WATCOM%\BINP\DLL
+      SET EDPATH=%WATCOM%\EDDAT
+      SET INCLUDE=%WATCOM%\H;%WATCOM%\H\OS2
+      rem
+      rem ; Native Windows Harbour binaries need to be installed on this path
+      set HB_BIN_COMPILE=C:\hb-watcom\bin
+      set HB_PPGEN_PATH=%HB_BIN_COMPILE%
+      rem
+      set HB_ARCHITECTURE=os2
+      set HB_COMPILER=watcom
+      set HB_USER_PRGFLAGS=-D__PLATFORM__OS2 -undef:__PLATFORM__WINDOWS
+      set HB_INSTALL_PREFIX=C:\hb-%HB_COMPILER%
+      call make_gnu.bat %1 %2 > log-%HB_COMPILER%.txt 2>&1
+      ---
+
+      --- Open Watcom C++ on Linux (requires native Linux Harbour binaries)
+      #!/bin/sh
+      if [ -z "${WATCOM}" ]; then
+         export WATCOM="/opt/lng/watcom"
+         export INCLUDE="${WATCOM}/h:${WATCOM}/h/os2"
+         export PATH="${WATCOM}/binl:$PATH"
+      fi
+      # ; eliminate libraries which scans for local host header files
+      export HB_XBUILD=yes
+      # ; Native Linux binaries need to be installed on this path
+      export HB_PPGEN_PATH="/tmp/cros-hb"
+      export HB_BIN_COMPILE="/tmp/cros-hb"
+      # ;
+      export HB_ARCHITECTURE=os2
+      export HB_COMPILER=watcom
+      export HB_USER_PRGFLAGS="${HB_USER_PRGFLAGS} -D__PLATFORM__OS2 -undef:__PLATFORM__UNIX -undef:__PLATFORM__LINUX"
+      export HB_INSTALL_PREFIX="$(pwd)/hb-os2/watcom"
+      ./make_gnu.sh "$@"
+      ---
+
 
 HOW TO GET THE HARBOUR SOURCES
 ==============================
diff --git a/harbour/config/os2/global.cf b/harbour/config/os2/global.cf
index 1ba4f20ca8..c1bc9bfc09 100644
--- a/harbour/config/os2/global.cf
+++ b/harbour/config/os2/global.cf
@@ -26,17 +26,34 @@ DIRSEP = $(subst /,\,\)
 
 MK = $(subst /,\,$(subst \~,~,$(MAKE)))
 
-ifeq ($(OS2_SHELL),)
-	# Not running on OS/2 (which comes in handy for 'make -r clean')
-	RM = del /q
-else
-	# Running on OS/2
-	RM = del /n
-endif
-RD = rmdir
-CP = copy
-MV = move
-MD = md
+ifeq ($(OS2_SHELL),) # non-OS/2
+   ifneq ($(ComSpec),)
+      COMSPEC := $(ComSpec)
+   else
+      ifeq ($(COMSPEC),)
+         COMSPEC := cmd.exe
+      endif
+   endif
+   RM = del /q /f
+   RD = rmdir /q /s
+   MD = mkdir
+   CP = $(COMSPEC) /c copy
+   MV = move
+
+dirbase::
+	-@$(COMSPEC) /c if not exist $(ARCH_DOS)\. $(MD) $(ARCH_DOS)
+	$(if $(LIB_DIR_DOS),-@$(COMSPEC) /c if not exist $(LIB_DIR_DOS)\. $(MD) $(LIB_DIR_DOS),)
+
+clean::
+	-@$(COMSPEC) /c if exist $(ARCH_DOS) $(RD) $(ARCH_DOS)
+	$(if $(LIB_ARCH_DOS),-@$(COMSPEC) /c if exist $(LIB_ARCH_DOS) $(RM) $(LIB_ARCH_DOS),)
+
+else # OS/2
+   RM = del /n
+   RD = rmdir
+   MD = md
+   CP = copy
+   MV = move
 
 ifeq ($(LIB_PATH),)
 
@@ -59,6 +76,8 @@ clean::
 
 endif
 
+endif
+
 else  # bash
 
 ARCH_DIR = $(HB_ARCH)
diff --git a/harbour/config/os2/install.cf b/harbour/config/os2/install.cf
index 0137b30ee1..d384986655 100644
--- a/harbour/config/os2/install.cf
+++ b/harbour/config/os2/install.cf
@@ -10,17 +10,28 @@ else
 
 ifeq ($(SHLVL),) # non-bash
 
+ifeq ($(OS2_SHELL),) # non-OS/2
+
+INSTALL_LIST = $(subst /,\,$(INSTALL_OBJS))
+
+INSTALL_RULE = \
+	-$(COMSPEC) /c for %%f in ($(INSTALL_LIST)) do copy "%%f" "$(subst /,\,$(INSTALL_DIR))"
+
+else # OS/2
+
 # We have to use script to overcome the max command size limit
 # NOTE: The empty line directly before 'endef' HAVE TO exist!
 # It causes that every commands will be separated by LF
 define inst_file
-$(COMSPEC) /C $(CP) $(file) $(subst /,\,$(INSTALL_DIR)
+$(COMSPEC) /C $(CP) $(file) $(subst /,\,$(INSTALL_DIR))
 
 endef
 
 INSTALL_LIST = $(subst /,\,$(INSTALL_OBJS))
 INSTALL_RULE = $(foreach file, $(INSTALL_LIST), $(inst_file))
 
+endif
+
 else  # bash
 
 INSTALL_RULE =\