I've never been able to figure out clrmame. Whenever I launch it, the best I can do is scan roms. But it gives me all kinds of errors. Even after I've downloaded a complete rom set through a torrent that's been verified to be clrmame'd already. I know there's instructions out there but I can't make heads or tails with them. They even have .dat's for stuff like the artwork, but I haven't even gotten that far yet. Any helps?
clrmamepro's not hard to use at all.
Set up a profile by clicking CREATE...
In the top field, browse to your MAME .exe
Under Description, type MAME .106 or whatever you're using
Under Emulator select MAME
Click CREATE
Select SETTINGS on the next window and input your file paths.
Click OK.
Select SCANNER on the main window.
Check boxes on the left to scan whatever you want to scan for.
If you want clrmamepro to fix errors it finds, click the boxes on the right.
Select any other options you would like and click SCAN.
If you didn't ask it to fix errors, feel free to look at the notes - it'll tell you what's wrong with each file.
You should have it made from there. 
Any other questions feel free to ask.