treehugger.com had an article about E85 conversion kits from Brazil.

I have heard lots of different pros and cons about rubber melting and
lower milage etc.

It states that the kits will work on any car. Any reasons why it
wouldn't work for a 2000 BMW? I figure I can just drive down to the
local university's frat house and fill up on used ethanol (kidding).

http://www.abcesso.com/
http://flextek.com/