automatic shift kit?

i am planning on getting a nirous kit for my 2.0, i don't have a enough for a supercharger or turbo, so this is my only cost effective way to gain more hp. so with that said, i was wondering if there is a way to firm up the shifting im my auto trans,. will a chip do this?, i know your not suppose to run N2O and a chip. is there a way that i can run chip and N2O with out problems? how else can i firm up the shifting. my dads duango has a chip and when the trans shfts it feels a lot stronger harder. im new to the vw scene, so i don't know much about these cars.
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