I've read over the comments about multiple installs and am wondering if installing each version on a separate drive would be better.

e.g. sw08 on C:, sw09 on D:, sw10 on E:, etc...

Will this eliminate problems with add-ons and the system registery?

Thanks, DC

Dell Precision T7400

X5472 @ 3GHz - 2 proc.

8GB ram

64 bit OS