Most people who go down this road will mount Gen 3 (Resonant) knock sensors on the sides of the Gen 4 block.

There is no Rosetta Stone for this component / controller mismatch. There are commercial suppliers (Howell and PSI come to mind) who sell wiring harnesses and PCMs for 24x LS2 engine layouts (with Flat Response knock sensors), but in actuality these have ZERO knock protection - in other words the PCMs don't work correctly with the Flat Response knock sensors.