Where and How to place a 2007 Derby Future Bet?

[Dana666]

Can anyone help in providing info. on where and how to place a Derby Future Bet?
I\'m looking at a rather obscure horse at this point and don\'t think he\'ll be listed on the February Chruchill Downs Future Bet, so I\'m thinking I may need to go to Vegas, but I would rather play on-line if possible, since I\'m quite far from Vegas. I saw the horse listed at 150-1 on one online site, but they had no instructions as to how to bet.
Thanks!