ok yah, i usually quadtrack my guitars when i record my band. i didnt know if that sort of approach is needed with this style. so shal i just leave the acoustic center?
Acoustic guitar rarely sounds all that good multitracked; it can get muddy real quick, especially if you're using the same guitar. If you wanted to double track, that can be pretty good, but it's best (IMHO) if you use two different guitars (even better with two different guitarists

), or at least two different mics or miking styles.
And with two acoustics, the ideal is slightly different than with electric doubling; I find it usually sounds best when the lines stray from each other somewhat. Not in terms of sloppiness, but in terms of purposeful variations here and there.
But more than two acoustics, while that can sometimes work well - imagine a power anthem done Kingston Trio style with 3 or 4 backing guitars - can be tough to mix well without getting a large buildup of mush, and is IMHO usually not necessary. I did a session in an apartment once with four gits,
a blues harp, and a Tascam portastudio (this was back in the early 90s) that came out sounding fairly good, but that was with pretty heavy automation mixing on the computer after the fact that resulted in a mix that used two of the guitars less than 30% of the time, often only for adding an occasional fill or arpeggio here or there.
And remember there are plenty of big-name artists from all genres who have released popular and successful acoustic recordings of just themselves and their one guitar. Worked fine for Bob Dylan, Johnny Cash and Neil Young

.
If you're recording the git in mono, you can put it center if you want, but just some simple stereo like the git 35% left and the vocal 35% right works fine. This is especially good if you set up the vertical stereo pair I mentioned earlier, and results in a very "natural" sound.
If you record the git in stereo (i.e. two mics as a stereo pair on the one guitar), or lay down two git tracks, you can give those a stereo spread and throw the vocals down the middle, or give the gits a stereo spread from full left to center with the vocals 50%-100% right (to taste).
G.