I only JUST started preparing to do "Art of Life" and i need some very basic help.

I wanted to turn Art of Life by X Japan into a CDLC because no one else had done it and why not? I've found a solid .GP5 file and it's all smooth sailing. Except that all of the BPM settings in the file are wrong. There are a lot of tempo shifts in this file and when listening to it in sync with the song, it goes out of sync pretty damn soon. I've been making some progress on fixing it, but after nearly 5 hours, i must admit that this is one thing i just can't do properly.

I need a good soul to help me align the BPM's in this sheet with the studio version of the song. I simply can't do it properly and it's driving me nuts. Too many shifts and too many weird tempos. If anyone is up for this, i'd be very grateful since the rest of the process isn't beyond the scope of my abilities.

If this is the wrong place, then sorry. Thank you very much.