First of all, it's already finished, download at the bottom of the post.
So I have to credit two people for the inspiration, GeneHF with the JPN~PAL looping project and Taxman with his looping oggs!
And why am I the retarded one remaking something already done? I think the big work porting the game took most of the time that is necessary to loop songs that weren't projected to loop, like CCz and MMz for example.
Well, the OST in Taxman engine was encoded in a low, not too low of course, bitrate, so it's very fine for playing with speakers but if you have a nice earphone/headphone, you can tell its somewhat's not nice, like if it has been encoded to ogg from mp3. Altough the OGGs are VBR quality 5, they sound really crisp as they were all encoded from FLAC, even on an audio editors the waveform is very well preserved! In fact this was made with another purpose too but you'll know on the right time (I don't want to ruin the surprise! sorry!)If you have any better looping idea, just try making an example file and I'll add to the list and credit you! This songs can be used on anywhere, it would be nice if I got credit, but I can't require it on something that I don't even own :V.
Here is the download link. SONIC CD USA LOGG
You can play LOGG (looping ogg) files on Winamp and foobar2000 with the vgmstream plugin and it needs these DLLs (read the readme inside any release zip!).
Also! If you have any criticize please I'll be fine to hear, if you have a suggestion for a loop enhancement, please do upload an example file of the transition and you'll be credited.