Gary,
Glad to see that you are making progress.
Quite honestly, it is now a little difficult for me know know exactly where you are. How many databases do you think that you have? One? And how many "moodledata" directories do you have? One?
If you now have one clean install, with nothing in it, I think that it could be safe to try to import your old course. I am not sure if it will work because there might be an upgrade order to doing this (that I cannot recall), but I don't think you can do too much harm, especially now that you might know how to recreate everything. Maybe Howard or others can give you other information about this.
Even if you succeed importing a 1.9 course into 2.3, make sure to check out everything before you use it.
The IP/Domain swap should be pretty straight forward, and GoDaddy has actually helped by phone with this, since domain management is not in your VDS. When you are ready to do this, phone GoDaddy and have them walk you through it, or have them hit the keystrokes.