Adding sections to existing psarc file

Hey there, pretty new to editing/creating cdlc files so I'm pretty lost. Some songs in my library that I've downloaded don't have any riff repeater sections, making certain parts difficult to learn. I've been playing around with eof and the rocksmith toolkit to try and edit files to include sections but to little avail. Has anyone tried doing this? Thanks for any help

Edit: Found a tool that does exactly what I need to do. It can also sync up notes if need be!

It's called the BPR tool and it super easy to use.

Here is a link: http://customsforge.com/topic/15687-beats-phrases-resynchronizer/page-1

Thanks to Chlipouni for making it!