Wow! You've got a lot of patience! I simply use Tag & Rename, a VERY good utility. Great at doing 'batch tagging'

Give it a go, I'm pretty sure you'll like it. (I liked it better than mp3tagstudio because in the days I started using it, mp3tagstudio didn't do v2 tags yet)

Theres a fully-functioning one-month trial version downloadable from the site.