In your autoexec.bat on the line where GUEST is called, add LETTER=H.
There is info on this in the help  under loading zip.
Howard Papke

>I recently purchased an 100 meg zip drive (Iomega) that when I run setup,
it locates and installs on drive H. Drive G is my last drive and it is the
cd. When the computer boots up, it kicks the cd to H, and takes G. Since I
have quite a few programs that point to g as the cd drive, is there any way
to make the zip stay on H?? Ther is no option that I can find in the
properties/settings tab that I can find to do this, although zip
documentation says there is.
thanks
>ed