ecu confusion

[razorpena]

wassup everybody,
I need some help or info k20 swap. I need to reprogram the ecu for my car in order for the key to be accepetd by the rsx ecu, i was wondering if anyone how this is done. I mean if i took my stock civci key and all othe ecu parts to hondata can the program the ecu to accept my key or do i have to take it to the dealer and have program my ecu to accept the civic key.
Also the wiring harness, haspaort claimed 2 have it and some other parts but they don't have anything but the mounting kit, it really bugged me because they told me they had it and when it came time 2 ordering they said no they don't have it.ahhhhhhhhhhh.
Well any help will be greatly apprecaited.
Later
Ramon