Romcenter

First, sorry for my english.
I would to update the new roms supported with romcenter but i think it's impossible (and i don't want to use clrmamepro). I have for example a pack with sets to 0.91 to 0.92. this contains a lot of folders, for example a folder called colt (game name: colt) and this contains all sets necessary to run this game.
Romcenter shows this game as a folder (not a zip) and status ok (with .92.dat of course). This is perfect, but now i want Romcenter convert this folder to a zip file. I thought that /Shell operations/Rezip files could do this but if i do that nothing happens. The zip file don't create.
There is any way to do this with romcenter??? Or is impossible?

Zip your original "pack with sets to 0.91 to 0.92" and fix again.

This don't run. I zipped all folders in one zip called 92.zip. I put this file into the roms folder of mame. I run Romcenter (2.70 beta 6), i find the 92.zip and i click fix. Nothing happens...well one thing: 92.zip dissapears and appears on Romcenter/archives folder.
What i'm doing wrong??