Well, I just tried to move on to the latest version, but I got a Drupal 'Page not found' error when trying to browse root. I'm testing the upgrade on a subdomain, to avoid problems with the main domain's live site. I had UC Alpha 7c and Drupal 5.1. I uploaded Drupal 5.3 and UC Alpha 8, ran update.php and then got the error. I changed settings.php and checked htaccess, but I can't figure out what's wrong. I'm using a copy of the live site's database. Before I upgraded Drupal and UC, I checked the subdomain test site and it was working fine. I tried yesterday to perform the update locally, but got the same error.

I thought it wouldn't be that difficult, since kaizen upgraded from a similar scenario. Anything that must be changed on the database file or elsewhere(already had changed any occurrences of the main domain with the correct address for the test subdomain)?

Thanks for your help =)

Update: I guess it was a silly mistake. Just changed frontpage to node at 'Site Information'. However, when I first installed Übercart, I didn't know that such modules should be placed at sites/all/modules. Instead, I placed them at the default /modules directory. I tried to change Übercart's location for this upgrade, but I noticed it was not working correctly. When I tried to enable modules, I got too many errors. Can't I change Übercart's location to sites/all/modules without messing up the site's configuration or database or something? Thanks again.