I've been at my PC all day but now I've updated my howto's again .
I now support the rt2500 (PCI) card (I have no rt2500 PCI card, so please report any bugs or etc. here or on the DSlinux forums) and have added a slow-system part/version of my howto.
If I am correct the rt2500 should be functional in newer versions of Knoppix.
I still use the same Linux WMB app with the rt2500, so maybe it helps compatibility.
The slow-system part/version requires no compiling to be done, shaving down a lot of time if you have a slower system.