VPC is a wonderful PC emulation program that allows you to run most PC apps on your mac (but I assume you know that).
The main pitfall is speed - I run it on a G3 Powerbook, and it is god-awful slow. Supposedly VPC is faster on a G4, but I have never used it on one, so I assume this is true due to Velocity engine, but don't know from first-hand experience. (also it doesn't support a 2nd processor)
I would suggest VPC if you have to use a PC program - especially an older one - but don't want to buy a whole new computer to do so. Simple PC apps usually will run just fine - but don't try photoshop, or some program that needs a good computing system. VPC simply won't cut it.
With regards to Kazaa, iMesh, or any other file sharing service - I have used Kazaa on VPC 4/Win98SE and not encountered any real problems. I would assume that the other file sharing networks will work fine under VPC. However, like most PC Software companies, I am 99.99% sure that they will not offer tech support if you run into probs while running their programs under VPC.
Might want to check this out for more info:
MacNN's Review of VPC 4.02
Hope this helps.
ps - this really is in the wrong forum. Maybe MacOS 3rd party software?
[ 11-06-2001: Message edited by: lenkman ]