Hello,
I have a good deal of experience working with Linux, moving sites around, etc. As I understand it, this will be a 3 stage process:
#1: Backup sites
#2: Upgrade software on one site only
#3: Move sites to godaddy.
Because of the complicated upgrade in step 2, I would advise upgrading the site on another server (I have a few, I can supply one temporarily) to ensure that the site doesn't get corrupted or harmed. From there, we can transfer the site over to godaddy, providing that they have the necessary requirements (php 5.2 , and a few other things).
If you'll look at my profile, you'll see 100% project completion, 100% positive (5 star) feedback, and a link to my own site where I've done the same for better than 10 years now. Your project will be completed with the same diligence and persistance. Your task will be completed within a 2-3 day period of time, and be given everything needed to be done right.
I look forward to hearing from you and working with you on this project.
Tom Whiting