For Memories of Green, there's really nothing I can do. The entire song looks the same on Audacity, it's hard to pick out a solid ending point, and it's not even that great of a song to fight to to begin with. I'd rather just leave it alone, if that's alright with you guys.
Sure you can! What I do, is when I find a looping point in the middle of a song, then I go back and select from the beginning of the song to where it should begin looping. Then, I past that right around where I want the song to end and start looping. Then, I roughly align the songs. You can do this aurally, just move the pasted part of the song around until you hear that both tracks are playing almost identically. Then zoom in, look for peaks in the waveform, and keep aligning them better and better.
Eventually, there is a "golden spot" of alignment, where when you playback the song, it will sound like it's in mono and not stereo due to the interference of the two identical waveforms. Once the songs are perfectly aligned, it's just a matter of ending the song in an area where you can loop it back to a starting point that is a multiple of 14336.
Now, you will occasionally have unresolvable clicking issues where there is a loud "click" noise at the loop point. I had this problem with that "Memories of Green" song. What you have to do here, is instead of just cropping the song at a certain point and looping it back to a multiple of 14436, you have to crossfade. Instead of cropping the song at the end and looping to a previous portion of a song, find that point where the loop starts, copy a portion, and paste it onto the end of your song. Then, you want to cross fade out the original track and cross fade in the pasted track; to do this, you'll have to select a little bit before the loop point, but make sure they're still aligned. Here is an example image:
Here is my Audacity project file of what I was able to do with Memories of Green. It's not perfect -- there's a little bit of a click at the looping point -- but it's pretty good, I think. You can combine the tracks by going to
Tracks > Mix and Render... . The loop begins at sample 817152. The muted track is the portion I used to align the loop.
http://www.megaupload.com/?d=YXPJ381X
Also there's a youtube playlist with the game soundtrack here: 
