Kelyess Remote entry

I lost my keyless remote and i have been thinking about getting one on ebay thje part number is GQ43VT6T. Does anyone know how to program the remote to my car instead of taking it to the blood sucking dealer? I have a 99 eclipse Gst

Any suggestions or help?

To reprogram your keyless entry system for a new key fob:
1) Turn ignition to OFF.
2) Ground pin 1 of the Data Link Connector (black 16-pin connector under dash driver's side). Pin 4 of this connector is a ground, so placing a jumper wire between pins 1 & 4 will accomplish this. Grounding pin 1 tells the system you are getting ready to reprogram it.
3) Close all the doors.
4) Turn the key to ACC, then back to OFF. The power locks will lock/unlock. The system is now ready to be programmed.
5) Press a button on your key fob.
6) If you have two key fobs, press a button on the second fob within 1 minute of pressing a button on the first one. Both must be programmed at the same time. If you only have one remote, press a button on it 2 more times to signal that you only have one.
7) The doors will lock/unlock to signal that the codes were received.
8) Remove the connection between pins 1 & 4.