Can Plastic pipe(cpvc) be used within place of copper to hook up a tub spout? ...

My stools are too dignified for the pub...
Answers:    Yes w/o a doubt - CPVC for both hot and cold water, PVC for cold solely.

A relative painless way to convert from copper pipe to another bits and pieces is the use of push fit 'sharkbite' type fitting.
ie: sharkbite x FPT
http://www.cashacme.com/_images/pdf_down...

Try to avoid the use of PVC or CPVC socket weld x FPT adapters.
Sewers! how do you put together this purse?
yes it could, many homes are done similar to that