I tried MP3 tag studio, but couldn't get it to do what I want... seems like a rather simple request too and I've tried quite a number of taggers.

What exactly did you want it to do?

I've got a large collection of mp3s. Most all of them have no tags (neither v1 nor v2). I want to create v2 tags based on the file name being "Artist - Title.mp3" and not create v1 tags.

What, just that? I know that MP3 Tag Studio can do this. If you need step by step instructions, I'm sure either me or someone else on this board can help you.

The only tricky part is the "not create V1 tags" step. I'm sure it could be done in Tag Studio (or you could choose to strip all V1 tags as a later step), but why would you want to? Tag Studio writes synched V1 and V2 tags by default, and that's a good thing. It's always good to have both (as long as they're synched), just in case you open your file in a player that's not V2-aware.