RSVEcosse, I've been having an occasional look at your SMF forums (as a guest) — though there are relatively few members so far and not many topics to view, I was wondering how you're finding it in comparison to your bad phpBB2 experiences, particularly with spam registrations?
As for your Coppermine Gallery, before either that or SMF gets too busy, you might like to think about bridging Coppermine into the SMF database in order to have a common login — I forget now how I did mine (over 2 years ago) but it seems that there is now a bridging wizard within Coppermine and you might like to start looking at
this forum thread on the subject ...
Anyway, if you're likely to stick with SMF and need any advice then please feel free to send me a PM or email ...