Win Merge is a really easy way of finding the differences between my files and changing them, thank you so much! I didn't get the chance to finish them all, but I will go through them all and will post how it goes. Can i ask, will there be many changes to the zen cart files after I installed the cart and made my modifications? I would like to avoid overwriting my changes here using Win Merge better, by knowing where to look out for them. And yes, this time I'm working on a copy so there are backups!