MAME Merged Romsets

[Minwah]

A quick question to the FE dev's out there:

How do you create your games lists when merged romsets are used??

Obviously, a straight dir of the ROM folder doesn't work, since clones are inside the parent zipfiles.  Using a dat file generated by -listinfo works great, as long as you have all the games.

I had previously been using the switch MAME -verifysets, which does the job, but of course is very slow.

The only other way I could think of is looking in the zipfiles, but I don't really want to get into that...

Thanks for any help