Originally Posted by: axe2i know what the intervals are,i just have trouble puttin them on all six strings.i wanted u to know that ,cause ur recommended modes first,to buy.do u still think i should start with toms modes book first,or should i bounce too intervals.ill buy both,but i can and should work on one at a time..

Yes, that's the right idea... buy both, then just go through the Guitar Fretboard Workbook until you get to the point where he talks about intervals and crossing strings. That comes really early in the book. Once you get that down, feel free to just focus on a mode, learning it, jamming it, etc.

Tom Kolb's book "Modes for Guitar" is quite direct and succinct. He starts with Ionian (the major scale) but you could just jump right in to studying whatever mode it is you want to learn. The five "octave" patterns that he uses to show how to play the modes are all the same, its just the root notes that are different, so once you learn one mode, it'll become easier to learn others.

For backing track selection, I have the BOSS JS10 which comes loaded with a bunch of backing tracks. I just go through them and try different stuff, then bookmark the ones I really like. I'd recommend that you start by just listening to backing tracks, and finding ones that like the sound of without worrying about what mode would go with it. Then, play to the backing track, and at that point figure out what mode would go well with it. It would probably help to try and hum or sing a bit of the solo first, as you guys were suggesting in a different thread. Then, when you've got an idea that you like, figure out what mode you're using. I do that all the time. Don't be surprised or put off if you find yourself mixing modes... it happens all the time and some track lend themselves nicely to shifting modes at certain points.