Beetle Adventure Racing is playable -- it's just that the graphics aren't even right. The cars in the game on the PC are usually gray or black. If you have a dual-core machine with a high-end graphics card, you're good to go. I know for sure that Indiana Jones can't even boot.
I would love it if N64 emulation on the PC would get right first before anyone worries about N64 emulation on PSP, Wii, DS, etc.