Thank you for your knowledge. Its a shame because I was looking forward to taking Reaktor to bed with me tonight. Will have to make do with Sculpture instead. But seroiusly, going off on a different direction slighty. I can use Reaktor as a standalone but my 1.83Ghz 512RAM MacBook can not handle most of the ensembles. Is it down to my 512RAM?. Would find it surprising though and a little disappointing. Am heading to Kings Cross tonight to swap my body for more RAM Cheers Nathan