It wont work. The speedo signal goes thru the stock ECU. Supposedly there is a Cruise Control ECU, but Ive never seen it. Best bet if you want to keep cruise would be to leave the stock ECU in just for that, rad. fans and ASD relay control. I never had cruise and had a dead ECU anyway so I just went standalone.

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls