Can anyone enlighten me of an easier way to process vendor bill payments? currently checking the boxes individually has proven to be a very very slow process..

If you click the Customize button, you can add filters you can set to shorten the list which can help speed up the checking process. Can also add columns if you find that you're opening bills one by one to check the details.

hmm I was thinking more csv import. is that possible? or can you only import payments being applied to invoices?

You're able to import Vendor Bills just be careful there as those will post

what is Vendor Payment Bills : Line?