Thanks nsdtech and Nightvision, it's good to hear that YAF can actually run on GoDaddy!
I checked on the version of .NET as you suggested Nightvision, it was already set to 2.0/3.0/3.5., but I switched it down and then back up, and then it worked.
I then had the option to install YAF and it installed just fine, odd.
Normally I would opt for the latest version of any software, but the forum that I am moving happens to be running on 1.9.1, so I am planning to get it moved and then upgrade to 1.9.3.