What did you expect? Some users managed to get the mods I refered to running. They probably didn't bother to post. Others didn't manage to apply the mods (maybe because lack of skills, maybe because they made an oversight, maybe because the initial code contribution doesn't work), that's why they replied to those threads, asking for help. Don't let yourself get fooled into believing that those mods don't work just because someone posted that he didn't manage to accomplish what the mod is suppossed to do. I'm pretty sure that if you should decide to come up with a mod of your own and post it, there will be others who will complain that the mod doesn't work for them. Does this make your mod bad? Does that mean that your mod doesn't work for you? No, of course not. Consider a mod thread that has a lot of replies just as what it is: a popular mod.
After all, the support board is full of postings of users who complain that coppermine doesn't work for them as expected. Does this mean that coppermine is bad? Maybe... Does it mean that coppermine doesn't work for you? No, probably not. The vast majority of users who manage to apply a mod will just walk away and not post a help request.
If you want clean mod threads (without people complaining that things don't work as expected), we could lock the mod threads the moment they get moved into the mods sub-board, so nobody can reply. Would this be more helpful for you (as a user)?
Just forget about the ifs and buts, but choose the mod you prefer and apply it to your coppermine driven gallery. If it works for you, then fine. If it doesn't work for you, roll back your changes.
What's the use of your posting anyway? You want flawless code? Then code it for yourself...
If your skills are not enough to code this for yourself, go for the trial and error method.