Use USB as RAM in XP

Please help me find a software using which I can use a normal USB drive as RAM (like Readyboost in Windows 7) in XP. It will be nice if it is free, but if good, paid too is ok. Hope I conveyed my requirement correctly. Thanks.

You might want to take a look at this http://www.ehow.com/how_6054256_use-usb-memory-ram-xp.html

Am still searching for more stuff, will post back as soon as I find something.

Thanks X720, so nice of you to help.I found Eboostr. If any better tools, please suggest.