Hello seeker2734 and welcome to these forums. You'll find many helpful people here and a lot of useful information. A 64-bit host will only load 64-bit VST(i)s - I'm pretty sure that Proteus VX and sfz are 32-bit. There is talk of a 32-to-64-bit wrapper and you may be able to run Reaper 32-bit on Vista 64, I don't know. ================================================== ========== Make sure that you purchase Nicholas' excellent User Guide and ReaMix docs too. Worth their weight in gold. v3 User Guide: ... v2 User Guide:.. ReaMix:....... Purchase:.... Distribution:. Donation page: Nicholas has also written "Home Recording for Beginners", available at all good book shops: If you can, get hold of a copy of the Computer Music Beginner's Guide Special #32 - it's full of tutorials for beginners, using Reaper. They will ship it internationally: