Thanks guys. So far things are not going well. Nothing appears to be working, started with 2.4 and got errors. My hosting company said the MySQL versions were different (they are only up to 5.0.91) so I had to jump down to 2.2.6 but after moving the files there I still can't get beyond the "Database Settings" page - still get errors trying to connect to the database. I might just jump to the 1.9.5 version I have and start there. Hopefully it works.
You guys mention "upgrading" but exactly how do you "upgrade" an existing installation? The only way it appears I can do the installs with my hosting company is to download the install to my Windows laptop, unzip it, then FTP the files to my Linux server. I haven't seen an upgrade option anywhere, can you guys point me in that direction? Fortunately I'm moving the site to a new server so my current site is unaffected by these hassles.
Also when I move the classes, do I have to move more than just "import" the class zip files?
Thanks.