Good luck finding a wrapper that will actually work
Everyone I have talked to that have tried a wrapper had nothing but problems. A few threads on other forums for RB say the same thing...wrappers don't work for RB.
If you have a spare PCI slot pick up a Voodoo 2 ( they are very, very cheap and readily available from E Bay and other sources). Setting up one or two V2's is very easy as well. It will work along side your current card, but will let you run RB and let you see it has it was meant to be.