Setting up album format

What is the best way to comine my selected sessions into one master session for mixing and album preparation, (without killing my CPU?)

Record each mix to a new track in each session then export the file. Import each to a new track in a new session called 'master'. Set up the track list in the edit window, apply your mastering plugins on each track, then bounce each down as a separate file, applying dither last to each one. Burn these files to CD using a separate program like CD Architect. Voila! Sonny

Pro Tools does not have a mastering plug-in?

I definitely will thanks, guys!