lipo wiring

i was at work today (hobbypeople) and i was looking at my price on some new lipos we got. and i wanted to use 2 x 2cell 3200mah lipo packs on my e revo

but

i was wondering is there a way to wire them up so its not 2 cells any more but 4 cells and to also do the same with the mah. so instead of 3200 it would be 6400mah.


thanks