I'm guessing you did something like:
- Extracted Geexbox to an iso
- Added the iso to UBCD's iso
- Modified the menu to exec "diskemu geexbox.iso"
Is that what you did? If not, tell us how you did it.
If it is what you did, then Geexbox is one of the many,
many isos diskemu CAN'T boot properly. In fact I don't
even know what isos diskemu CAN boot, even though it's says
it can. iso booting only works for a few. You might have
better luck using "bcdw Boot /path/to/geexbox.iso" but it
would not surprise me a bit if that didn't work.
Since it appears Geexbox is linux based, pretty good
chance you can get it going however.
I believe the "How to add any Linux-based CD to UBCD" documents
were outdated anyway so we really don't have updated docs
for this. However, you can look at the following posts:
It's technical and not a howto, but you should be
able to glean how to do it from the threads.
Post with problems.