I am using SilkPerformer on XP SP2. Performer seems to crash every few times I try to close it, but its definitely usable. I've found it to be much more stable on Windows 2000 in general though (weird).
Also, Segue released SilkPerformer 6.6 yesterday. Perhaps that might help you.
According to our IT department XP SP2 closes down a lot of port and tightens up access to other networked machines. We have not cut over to it and will not until we are confident it will not shut down our monitoring.
But in the end doesn't it all come down to BEER? Beer is the ultimate answer to all questions in the universe so yes the answer to your question is BEER.
Thanks folks, but unfortunately the SP2 upgrade has been forced onto us regardless of the amount of protestation about the falabilities of SP2. I think it'll be up to Segue now to sort this one out....