For the multi boot, it depends on how ol the game is. Some games refuse to run on current CPU (too fast), or are unplayable, even with moslo or CPU Killer.
You will find a good boot disk here :
http://www.shinod7.com
The site is in french but the boot disk is multilanguage.
624 ko conventionnal memory.
This disk has some drivers for recent sound cards --> SB emulation.
For older games you can use
http://dosbox.zophar.net. It's hosted at zophar, but it's realy good.
286 VGA, Adlib/SoundBlaster and Dos 5 are emulated.
