I've never got them to build. It's a part binary driver made for kernel 2.6.5. The one I had hoped would work for 2.6.21.5 was from here:what about trying the proprietary Realtek wifi drivers -
http://rtl-wifi.sourceforge.net/wiki/Main_Page
This one builds fine on both 2.16 and 2.17. But when I load the modules it complains about bad symbols and the card doesn't work. They have a forum, I'll do some searching. I uploaded the 217 kernel source sfs file to puppyisos.org and sent Mark a PM.
It's 1:15am time to sleep.