I don't think so, Gis.
I kept notes of what I added and edited last time so that will hopefully help when I need to do it again. The trouble is the PHP pages will probably look a lot different to the existing ones, and it can take time to work out where in the script things need to go.
I may need help when it comes to bridging a new version of Coppermine to the forum - I remember it was quite a pain in the butt last time.