Multimedia projectors/audio

[Prufrock]

Hi there. I have a question open for any brainstorms: I am managing an A/V department for a small private college (ie. no budget) that just recently installed several InFocus and Sanyo overhead multimedia projectors (ceiling mounted, no less). These are hooked up to computer workstations as well as VCRs. Now, my question to you all is this: On a BUDGET, what's the best way to get quality SOUND from this existing setup. I have a few external COMPUTER speakers (powered) but not enough to go around. I know I'm going to have to order SOME parts, but I'll have to keep the budet low. The Sanyos have one external audio OUT, but they'd have to be split, mounted along with the unit, or else strung through the ceiling down to the walls. That's a possibility.
Right now I can use the external PC speakers for better audio for the computer, but VCR sound quality is very poor through the projector's speaker. I don't want to have to buy amps for every VCR.
Thanks in advance!