I like to program as a hobby, and I'm currently coding a test application for DOS in OpenWatcom that uses a small VESA windowing library I wrote. This test application uses a wallpaper, an pattern image that is shown inside a window and an icon.

Until recently I was reading these files directly (test.bmp, stest.bmp and test.ico), but now I concatenated them all using a "COPY /b test.bmp+stest.bmp+test.ico test.res" and I am reading them as a stream (my image classes have both a ReadFile and a ReadStream function). It is working OK, but I'd like to have this resource concatenated to the EXE file. I uploaded the test here (yeah, the clipping system is buggy):
http://www.geocities.com/alexanrsousa/files/bin.zip

I know it is possible because I've seen some applications doing such a thing, like the PLANY.EXE included in Arachne (I did not find plany's source code, though Arache itself is open source), in which you can do something like "COPY/B PLANY.EXE+SOUND.SND SOUND.EXE" to create an "executable" sound file.

Does someone know how to do this? I'd really appreciate to learn how to do it.