A New Guy In E-Revo Stuff, HELP!

[PoPic]

hey guys im popic from israel,
im the owner of traxxas revo 2.5 with big block conversion
and stronger diffs and gearbox
my hyper 21 engine has just died :019:
i never had an electric R/C (beside mini inferno but it dont counts)
i wanted to convert my revo to electric revo
and my questions:
1. how can i do it? at the cheapest way
2. can i use the original transsmision?
3. anyone have a guid or something?

thanks a lot:003: