Need help making a song loop? (Dan Dan Kokoro Hikareteku)

[Kuwabara]

I need a smooth 20+ minute loop of the song Dan Dan Kokoro Hikareteku, the full version. My boyfriend needs it for a project, the specifics of which I have no clue apart from "you're going to laugh lol."

I tried to make one myself but have had trouble making the transitions sound smooth and professional enough, is there an easy way of doing this? So far I've tried Audacity and splitting in Sony Vegas, and didn't like either of the results. The song should still begin and end the same way as it originally did, but with the middle verses and guitar solo repeated over and over in between. I can supply the MP3 through third-party means of course, I don't think I've posted here previously so I'm trying to tread lightly as far as the rules are concerned. Any help is definitely appreciated!

[cRookie_Monster]

The trick is to nail the timing and do a tiny equal power crossfade. It takes some rhythmic know-how ^^ I sent you a PM.