Hi, have you tried it yet?
Most USB card readers don't need any drivers or kexts, even for OS9...
System Requirements:
Computer with at least one USB port
Windows® 98SE, ME, 2000, XP and Vista
Requires Macintosh OS 9 or X; Built for Mac OS X Windows® 98SE requires a downloadable driver available at www.jascoproducts.com
http://www.jascoproducts.com/products/pc/viewPrd.asp?idproduct=660&idcategory=6