Anyone know if there is any way to convert .ogms to play on the PSP? Or if there is a program out there that I can use to convert them to .avi or something?

Since OGM is a file container you can't directly transcode it to another format. So what you'll have to do is first convert it to AVI using a program called VirtualDubMod (search on google). I'll do a little run through of it for you.

First, open up your OGM file and go to Streams --> Stream List. Here you will need to pick the audio track and subtitle track you want to keep for the AVI since you won't be able to switch between tracks like in OGM files. Click on a track and select Disable to not use that track. Now go to Video and select Direct stream copy from the drop down menu. This way it wont re-encode the video so you'll have the same quality in your AVI file as your OGM. Now just go to File --> Save As... Pick a filename for you AVI file, probably the same name as your OGM. Be sure to save type as Audio Video Interlace. Uncheck any checked check boxes (lots of checks) and select Save. Now this should only take a few minutes and you can then convert your new AVI file with something like PSP Video 9 or 3GP Converter.

eh... i think i may just stick to downloading avi's from now on.. i'm having some trouble and my brain hurts lookin at this stuff hehe