Dynamic Cache Service for 64 bit?

I noticed there's an MS download for Dynamic Cache Service for 64 bit. It says something about read file caching having the possibility to "consume all available memory." I'm asking because I noticed if I drag & drop large files on my Vista Home Premium 64 bit SP1 to a USB that can only write at around 24 MB/sec, the copy dialog shows it copying much faster. Then the destination folder shows a progress thingy in the address bar. I have 8 GB ram and haven't had a crash yet, but I'm just wondering if this is what they are talking about? If I copy a 4.3 GB image instead of a 700 MB .avi I don't want my system to choke!

Anyone have any info?

Here's the MS link
Download details: Microsoft Windows Dynamic Cache Service

well i dont know if you read this but here are a couple of links explaing the need of the problem it was orginally released for server 2003 i had a couple of beers so i just glanced at it
im a pure dork at a party and checking fourms for chache issues

Ntdebugging Blog : Microsoft Windows Dynamic Cache Service

Ntdebugging Blog : Too Much Cache?

hey i know this is not the place but i have a question how do i get to be a vitsa pro like you

Thanks for the links. Interesting reading. Sounds more like stuff that would happen to file servers. afa the Vista Pro goes, I dunno'. They must have stuck that there while I was asleep.