>>>>Do CV's have to be replace in pairs (left and right) or can I get away
with just doing the passenger side CV's.<<<<<

http://www.benplace.com/cv_joint_maintenance.htm

Nop to your question, but make sure to clean the old CV's, inspect them
carefuly before putting new grease.

I would do une CV at a time, both change both end, so you won't have to
worry about one side for a wile.

Have fun, it's a dirty job, Ben