I did read through the 'finally and answer for key...' but there really didn't seem to be an answer except to drive to Kansas City and have Leroy program it - and this is something I AM considering. My current plan to get my FOB programmed is to call all of the Mercedes local dealers (I think I got the list from this site) and ask if they have the 'Mercedes DAS system for Smart'.
The transmission fluid I used was Valvoline Dexron III. I ordered it from Amazon then later saw it at the local auto store by my house

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So now I'm already starting to scheme on my next Smart project. I'm thinking a high performance exhaust is the next logical step!

Maybe a blaster horn instead of the road runner horn.

The road runner horn is cute but maybe a little understated in a 'situation' where you could get mowed.