You can't add additional ones but you can assign a folder to a bios by double-clicking the "assigned sysdefpath" column.
Oh, believe me, I know. That's what I was doing before using that Auto button (boy, was that a mistake....).
You could e.g. move all your sets to your G:\M.A.M.E.\MameUI64\roms\standard folder and then click on move to get them sorted to the others...(well, of course only the ones are moved which don't belong to 'Standard').
Well, I think I may've utterly FUBAR'd my a great chunk of my whole setup tonite. I don't know what happened, but here's what I did:
1. From
G:\M.A.M.E\MameUI64\roms I CD'd to
G:\M.A.M.E\MameUI64\roms\standard.
2. I then did a "move /o ..\* ." (I'm using JP Soft's TCC) because I didn't want to overwrite anything.
3. I noticed a LOT of files left over in the "roms\" directory. This got me to thinking that, perhaps, I had a TON of dupes between "roms\" and "roms\standard\". I would've thought this would've been caught by the scanner, but maybe not.
4. I made some visual comparisons between
G:\M.A.M.E\MameUI64\roms and
G:\M.A.M.E\MameUI64\roms\standard and they all looked the same. I then went ahead and deleted all the files (not the subdirectories) in
G:\M.A.M.E\MameUI64\roms, as they appeared to simply be dupes.
5. I then ran a new scan. This took me completely by surprise, as it warned me of MANY instances of what you referenced earlier about capsuled rompaths (I forget the exact wording the cmpro log used). The Scan function was also complaining that a LOT of roms were in the wrong SysDefPath, but cmpro made no attempt to move them to the right path.
6. I knew something had gone south at that point, so I panicked (I guess) and ran over to Systems from the Scanner dialog. I then hit that "SetAutoDefPaths" button and, while it kept some paths correct, the vast majority reset to
G:\M.A.M.E\MameUI64\roms\standard. Remember, before I hit that button, ALL the systems and paths were perfect. I have NO idea why the majority of paths were (re)set to the
G:\M.A.M.E\MameUI64\roms\standard directory.
7. New scans revealed nothing new. The multiple capsuled path warning was gone, which was a good sign (I'm guessing), but there was still a lot of roms being reported as being in the wrong place. No amount of scans resolved this.
8. Not knowing anything else to do, I manually reset the SysDefPaths (a lot of mouse clicking). I then tried to automatically move the roms using that auto-move function and it didn't work. So, I was effectively back at square one.
9. Not knowing anything else to do part 2, I started rebuilding the sets. This time, I unclicked the "recompress" option, so it's running at LOT faster (up to 40% by the time of this part of this message). I expect it'll be done in an hour or so.
I really, REALLY hope I haven't totally corrupted things to the point of no return. I've obviously got a lot of work to do tonite with cmpro, so I'll do what I can and report back. If you've got any suggestions in the meantime, though, I'm ALL ears.