Start these 4 finger patterns on one string. Then, when somewhat developed, start skipping strings. Play each 4 finger pattern per string for starters. Once the fingers are developed then you can start playing using a pattern to play over multiple strings.
1/16 or 1/32 note patterns
i-m-a-c
c-m-a-i
1/16 note triplet patterns
i-m-a-c-m-a
c-a-m-i-m-a
To help develop a&c fingers you can also try these finger patterns
i-a
i-c
m-a
m-c
a-c
Try doing 1/4 or 1/8 notes on one string.
Also check out my free lesson on Truefire.com on resistive practicing. This approach can really speed up you development.
http://www.truefire.com/list.html?st...ry=byron+santo
Hope this Helps,