So I recently decompiled Punk-o-matic 2's song converter and added the ability for it to export 320kbps mp3s instead of 128kbps, which leads to a vastly higher quality with more room to work with in a DAW. Couple that with a few more years of knowledge with mixing and it leads to this result. You can compare against the original here - Bitter Past (newgrounds.com)

Additionally, I used convolution to seperate the guitar tracks and emulate different amp / cabinets which adds a fair bit of depth to it.