I'm looking for an easy way of transferring large files (50 - 200MB) from various laptops to a desktop system.

The obvious answer is a flashcard/thumbdrive (usb storage device).
The advantage of a thumbdrive is that most laptops will autodetect it as a drive if they are running 2000/XP, so I don't have to install software on the clients computer to retrieve their data.

However, I was wondering if there is software available to transfer data with just a USB cable.. Software that you only need to install on ONE SYSTEM.

Something that assumes the identity of a thumb drive would be perfect.. but searches have turned up nothing.

Any ideas? Thanks guys