I installed Vista 64 from scratch mostly to be able to use Vegas 8.1, but I since I would like to try some of the plugins available for Vegas and I read that those don't work in 8.1 yet, I was wondering if I will mess up 8.1 at all if I install 8.0c. Also, if I do, will 8.0c run at the same speed it would run in Vista 32 or slower because because it's running in a 64 bit environment?