How do I downgrade mame roms?

[Demon-Seed]

Hello
I have full set of mame .137 and downgrade roms .137.  How do I down grade to other versions? Can someone please explain what I need and how to do it?  I would appreciate it very much.

thanks
Jim

[Hoopz]

You need to use CLRMAMEPRO to downgrade your set.  You need to pick a "new" (or old) version to go down to.  You need the dat file from that version.  CLRMAMEPRO is has a steep learning curve but there are some tutorials that you can watch that really help out.

Depending on where you got your roms, you may find that the website has a FAQ section.  If so, you may find a tutorial there on using CLRMAMEPRO.   

[Demon-Seed]

Hello
Ok I have all the files and searched google, other emulation sites, youtube and this and I can not find any tutorial on how to do this? I am so frustrated please anyone help...

[WhereEaglesDare]

Hoopz posted the tutorial in one of your other threads you posted about the same topic.

[Hoopz]

Here's a tutorial that shows screen shots.  I haven't watched it all but it's supposed to cover it in depth.

http://www.cphsolutions.f2s.com/guides/cmprotutorial.htm

Or go to another site and look through the FAQs and there is one with screen shots and text showing what to do.  This link is a video/flash tutorial.  You'll watch it a few times or read the FAQ a few times to understand what to do.

[Demon-Seed]

Awsome thanks!