I've recently done a ZC swap into a 90 CRX, and I was wondering if swapping a Si B16 into a 92-95 hatch is alot harder than that? And what other other wirings would I have to worry about?

 

Well you have 2 some more details about the swap.
What year B16 you are going to use?
What year/model 92-95 Hatch you are going to put it in?
Do u have all the necessary parts for the swap ( mounts/shift linkage/axles/distributor/alternator/ecu/wiring harness )?

 

The B16 is from the 2000' Si, the hatch is a 94 I believe non-vtec, and yes I do have all the parts.

 

I for one can't imagine the swap being any harder. It's pretty simple from my experience (though the gen of Civic and B16A is different).