VistaMemory Use

I just installed Vista Ultimate on my wife's lappy, and am using a 1G USB drive for ready boost. I notice that memory usage goes up well over a gig when doing just normal browsing and such. Is this because it counts the USB memory towards that? I cant see it using the memory otherwise. Just curious if that memory is counted towards physical or cache.

Download Process Monitor v1.12, run procmon.exe, and post a screenshot of the running processes...

http://www.microsoft.com/technet/sysinternals/processesandthreads/processmonitor.mspx

I'll grab a screenie as soon as I figure it out. I opened it and there was about 40 pages worth of info. Looks like firefox is a huge culprit along with me converting video's from divx at the same time. but I do this all the time on my desktop under xp with half the usage. I do see the activity light on the flash drive going constantly.

Its probably because vista caches frequently used apps to memory for faster load times ...

Thats what I figure by looking at the process in there. it's putting most of firefox to the flash it appears which is fine with me.