I assumed as much... however I still need to recovery my data. The "Data" folder for mysql 4.1.14 is still there but I hadn't had a chance to do a full dump of all the dbs (the most important ones are backed up automatically eveyr 2 hours but there's also the user accounts etc that I was wanting to upgrade.
I suppose I need to just copy that entire folder... uninstall mysql 4, reinstall, replace the data folder with my backup, create dumps, uninstall mysql 4 and then proceed with 5?
what a headache.