guys, i dont think the question was one about the formation of the chords and pain involved but rather the squeak when changing chords and sliding across the strings.

this is something that takes time, eventually it will just come naturally.
the trick is to have your chords memorized so that you can brainlessly get to the position with accuracy. in this way you can slide to the next shape with your fingers off the fretboard intirely. in the meantime, for sliding to the next chord, what you want to do is lightly mute the stings with your right hand and very lightly slide along to the next one.

for acoustic, when playing chords, there probably shouldnt be all that much sliding anyways- it depends on what chords your doing. you need to analyze the chords is ways that you can keep a continous stum. for instance, if i were playing a progression of

G-C-D

i would strum the g chord, i would take those open stings in the g chords, strike them while changing to the C chord, strum the c a bit, then stike the last 3 stings and hammer on a D chord and strum, and that chord has some open strings, (the same ones as G) so i'd strike those again to switch to G.

this constant strumming, using the open stings to your advantage, helps a WHOLE lot.


hope this helps.