> No problem, CLRMAMEPro has a pretty fucking unintuitive interface :)
>
> Click on "Create"
> Point it at the most recent MAME binary you have (or whatever target version of
> MAME you're using)
> enter a little description, like "MAME 0.90u3"
> Click on the dat you just created and click "Load/Update"
> Click on Settings
> Make sure the drop down box says "Rom Paths"
> Click Add
> Select your MAME rom path
> Do the same for your samples, if you like. Also if your CHDs are in a different
> path from your ROMs, put that path in there as well (like C:\mame\chds or
> whatever)
> Hit ok to go back to the main window
> Click on "Scanner"
>
> Now if you're updating your stuff to the most recent version and such, just
> throw caution into the wind and go all out here. Make sure you have sets, roms,
> and disk images checked (and samples too, if you've got 'em), make sure split
> sets is selected, for 'no dump' handing click "Create Missing" and "hide
> missing" (why? Who cares? :)).
>
> Have everything under "Check" checked and everything under "Fix" checked as
> well. Uncheck "Ask Before Fixing" (Otherwise it's going to be asking you a lot
> of stuff). Under 'Advanced', check "Deeper check for fixable missing files".
> Under 'Checksums', click "Run analysis" and "Fix file if possible"
>
> When you hit "Scan", it's going to go through all of your sets and pretty much
> tear the shit out of them. Games that worked in 0.79 probably won't work now but
> it'll fix what it can, tell you what specifically you're missing, rename files
> and correct parent/clone relationships, etc. You're going to be pretty busy on
> alt.binaries.emulators.mame for the next few days as you try to grab all of the
> files you need to fix all of your sets, but it's a good first step towards
> cleaning your stuff up and updating it.
>
>
>

Get Mame .90u3, collect all roms.