Hi to everyone, I'm James and I need a little help in music production. I wouldn't say I'm that newbie, more like, not very experienced.

Well I'm on a Mac (10.5.8) and I've been using GarageBand '08 (4.1.2) to produce music and another program called "djay".
Screenshot: http : //i761.photobucket. com/albums/xx256/thejamesdolce/446c79d9.png
Without spaces cause it wouldn't let me write the link to the image.

1. As you can see in the screenshot it's a pretty simple interface with this useful (to me) ability, called "LOOPING" to loop parts of a music song. Only problem is that it is programmed to loop 2, 4, 8, 16 and 32 beats. I don't get why, I mean what if I want it to loop 3 or 6 or 12, etc.? Anyways, my problem is that while "djay" can at least loop a limited number of beats, on GarageBand I still haven't found out how to do it. Is there any way to do it, even if it is limited like in "djay"?

2. Also, in "djay" there's this "SPEED" panel which allows me to modify the BPM of whatever song I load – the ones you see on the screenshot are .mp3's. GarageBand only allows me to do it with file types similar to .wav, or .caf (Apple Loops) – when I load an .mp3 in GarageBand it is displayed in orange color which means that you cannot change the BPM. I mean if I can do it with "djay" it's only logical that I can do it with GarageBand too, which is supposed to be more professional. If there is actually NO way to change the BPM in .mp3's can I at least sync it to the Master Tempo of each project like I do with the .wav files or the "SYNC" button in "djay"?

Thank you for your time, I appreciate it.