Help Getting Started with Rebuilding PSX Image

[Agent1729]

Hey all, I've been getting started with hacks with a game I love, Rayman for the PSX. I started following the guide which almost every tutorial has pointed to, "The PlayStation hacking doc Version 2" by Cless. I was able to get some basic edits and level changes in, reinserting the files as he mentioned in Main Method 1. If I try to follow his instructions in Main Method 2 in order to add new files or files of different lengths however, I get errors from every program I can run to try and extract any .XA from the image. After a while I realized that I think it's not really a .XA file format, but the CD Audio files that he mentions right before Main Method 3. I can extract these with CDMage, but I'm not sure what to do with them, or how to go about recombining everything back into a Cue/Bin format that the files came from in the first place.

Essentially, I was just hoping someone could point me in the right direction, since the guide "is not too familiar". Any help or direction would be greatly appreciated, thanks guys!