Originally posted by SLY
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1-Ionian (the Major Scale)
2-Dorian (same as the Major but change the root to the 2nd)
3-Phrygian (change root to 3rd)
4-Lydian (change root to 4th)
5-Mixolydian (change root to 5th)
6-Aeolian (natual minor,change root to 6th)
7-Locrian (change root to 7th)

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Hang on a sec, you mean, modes are basically emphasising other different notes in a scale other than the root note. for exam knockin on heavens door consists of the chords G D C, those notes of which are played and sustained alot in the solo. A different mode would be emphasising an E a lot would change it from G major to Mixo... scale, is that what you talking about by altering the root?