I like the quick reply too... very handy
If you aren't in a huge hurry and got a good sized forum to import, I'd recommend waiting for 6.1. The importer really does do a much better job of the import process. I need to update the ubb.skin templates for 6.1 as well.
Turning off the ratings can be done in the templates just by removing the part that calls them. Fairly simple to do, once I update the skin, I'll make one without the ratings
Making a css file to match your current style is relatively easy as well...