I'm currently trying to upgrade my company's website which uses Drupal 4.3 to Drupal 6.15. This has been exceptionally difficult to do so far.
I realize I could simply start a new site using 6.15 and rebuild the website from scratch but there is too much data to have to import by doing things that way.
Has anybody done a similar upgrade and had success without breaking all the modules they've added and what not?
Any advice?