I have read a number of the upgrade posts and a couple seem to counter-dict which is best so I need a sounding board for the best approach to this.
I am going to clean install 1.5 for most of my existing 1.39h sites then re-customize them. The reason being I had to modify many of those Zen-carts (1.39h) files to be able to run on the low version of PHP on my hosting company's servers. Oh happy day!, they finally upgraded. So a clean install will correct all the changes. It may be more work but who said life was easy. What would be the best way to handle the DB.
Create a clean DB with the install then try to upgrade the old DB to it?
Create a copy of the old DB and point the install to use it?
Which ever will work best with the new improvements and keeps its security.
Thank you for you input.