In Vista 32 bit Prefetch doesn't work if Superfetch is deactivated. One nice tweak is to activate Superfetch only for boot and Prefetch for both boot and applications. So, if you're using eBoostr you may deactivate ReadyBoost, related ReadyBoot and Superfetch for applications. My computer is now running silently without that inicial HDD noise and almost in a way that only XP did.
I'm convinced that, if ReadyBoost is activated and we're using Intel TurboMemory in NVCache, eBoostr accelerates this cache that's why speed measures are so high (in my system about 10 times more then without TurboMemory). Maybe if there was an option to exclude NVCache we could try another configuration in order to optimize everything but ReadyBoost cache.
Configs: Total memory installed: 4GB; RAM: 3GB; eBoostr Unmanaged Memory: 1GB, NVCache: 500MB.
Greetings.