It is, with due respect, a whole lot more than timing belts......lots of little items that can be forgotten like: PCV valve, etc.
This is the kind of s/w I am thinking of:
http://download.cnet.com/BrightCar-Car- ... 080-1.html
If I have a PSW such as: /(=TJ+Hu,L$q6A;]Sy@;19`ZJ&Y$cI5a+Tk#u'*en
Is it 2x more effective if it is twice as long?