I see alot of PRO mechbunny users here :D We are a happy fan of
http://www.smart-scripts.com/194/ SMART TUBE PRO - no tube script is simply to get going regardless and it requires a few weeks+ of a learning curve - but if your going to be doing a proper tube site i'd recommend spending the $500+ on a system that will be supported and work today, tomrorow and foreverrrrrrrrrrrrrrraaaaaaaaaaaaaa