Evoodoo emulates the voodoo, so you don't need a 3dfx. You can try it. Okay, about boost wrapper, there are 2 ways to use it with emulators:
1) use suprahle or an early ultrahle
2) use the xengine and place the boost wrapper glide2x-file + xengine folder in the dir of you emulator, and the xengine plugin in the plugin-folder. Now it has to work good.