Just got a Coolmax USB2.0 External 3-1/2" Hard Drive Enclosure. Installation when without any problems and it works great. Transferred 4GB of data pretty fast. I'm extremely happy with it. Since my machine run WinXP Pro, didn't need any drivers.
Coolmax Model: CD-309-U2 (available at Newegg.com) for around $45
I would high recommend it for anyone transferring large files/data. I put a Western Digital 40GB 7200rpm HDD in the enclosure.
Hope this helps