is this going to be output to a TV? Monitor?
I have a DIVX/DVD box in my living room.. made it out of an old modded P2 350..
the Hollywood+ card is essential.. even slapped an old Voodoo3 3500 in there for the TV out and can download/watch DIVX or pop in a DVD/VCD then switch over to play some roaring Unreal Tournament or Worms2 on the big screen.
even mangaged to get a remote.. slap a wireless mouse/keyboard combo and for around $100 with old crusty parts I've got some fun!!
hope all goes well for you.
ripthesystem