You will have to add the vtec postive wire, vtec ground wire, vtec oil pressure wire, knock sensor wire, and then you can also add the evap purge postivie and ground wires, but those last two aren't required for it to run right (I don't have them hooked up and I get 32-37mpg on the freeway).

Also you will need to move the o2 sensor wires from one spot on the wiring harness to another spot, or extend them from the original spot. You will also need three ECU plug pins to hook your vtec wires into the back of the ecu plugs.
Thats just about everything needed wiring wise.

Also, I wouldn't buy anything off ebay, just get your swap from www.hmotorsonline.com

You'll have better luck with them, and they sell complete swaps with everything you need