This is the most straightforward solution. The patch is incomplete - you need
Srz/zsh.ico and Src/zsh.rc from Peter's 12594 (but note, that in this archive
they are in Src/Modules; beware when extracting). I could not convince GNU
diff 2.7 to diff binary file.

I modified Makefile rules; original had obvious problem when building in
source directory.

-andrej

Have a nice DOS!
B >>