Another Win98 option to hide the desktop is to not use it all. In c:\windows, resides your system.ini file.
You can edit this file to have the line that reads:
shell=explorer.exe
to
shell=mame32.exe (or really any other executable).
In my case, the computer boots directly into Mala with shell=mala.exe. I saved the modified system.ini as system.mla (for Mala) and retained a copy of the original un-modified system.ini as system.win
I made a bootable floppy, and copied system.win and system.mla to it. Then made two batch files also stored on the floppy.
mala.bat (which contains)
copy system.mla c:\windows\system.ini
and
win.bat (which contains)
copy system.win c:\windows\system.ini
I put the floppy in the drive of the computer inside my cabinet. Ran mala.bat from a: then reboot from the hard disc. This launches directly into Mala.
If I need to do any maintenance, I can just boot from the floppy and run win.bat from a: then reboot from the hard disc. This will boot me back in Windows98.
I'm going to play with your method IG-88 and see which I like better and/or which one leaves more RAM available.
Thanks for the tip.