After seeing Krisen Type-S’s car with the S2000 cluster retrofitted into his car, I had to do one for myself. Big thanks to Petah for already providing the pin outs for the S2000 and RSX and all the help, and Krisen for his help along the way.
DISCLAIMER: This is meant as a guide to help you. I am not responsible for any damage done to your car by you or anyone else that works on it using this guide.
For starters, I have to say although this task is not very difficult, it will require patience and some knowledge of working with electrical.
Krisen Type-S
Things needed:
1) S2000 gauge cluster
2) Speedohealer v.4 (http://www.healtech-electronics.com/) with universal harness
3) ECT convertor module (http://www.modifry.com/products/ect/index.htm)
4) Pin-out chart (http://forums.clubrsx.com/showthread.php?t=572949)
Things recommended:
1) S2000 gauge cluster wiring harness/plugs/pigtails
2) 2nd RSX gauge cluster (Doesn’t matter if it’s base or type-s)
3) Red transparent tape/transparency/cellophane
Reasons for recommendations:
1) Wiring the cluster to the RSX will be a LOT easier with existing plugs from the S2000 cluster. Otherwise, you will have to make your own harness (see below).
2) If you do not want to cut your existing RSX wiring harness, you can take the plugs from the 2nd RSX gauge cluster to make a plug-and-play harness. You can also use the housing to hold the S2000 cluster in the RSX (see below).
3) In the stock S2000 cluster, the RPM gauge, ECT and fuel gauges light up amber. If you would like to red-out those sections, you will need red transparent tape/transparency/cellophane.
Materials needed:
1) 30+ wires of gauge 22-18
2) 60 pin connections if you are making your own harness
3) Plenty of wire taps and butt connectors
4) Shrink wrap tubing to prevent connectors from touching
5) Pipe strapping to mount cluster and mounting hardware
6) Black plastic/foam for shroud
Estimated time required: 12+ hours
DISCLAIMER: This is meant as a guide to help you. I am not responsible for any damage done to your car by you or anyone else that works on it using this guide.
For starters, I have to say although this task is not very difficult, it will require patience and some knowledge of working with electrical.

Krisen Type-S
Things needed:
1) S2000 gauge cluster
2) Speedohealer v.4 (http://www.healtech-electronics.com/) with universal harness
3) ECT convertor module (http://www.modifry.com/products/ect/index.htm)
4) Pin-out chart (http://forums.clubrsx.com/showthread.php?t=572949)
Things recommended:
1) S2000 gauge cluster wiring harness/plugs/pigtails
2) 2nd RSX gauge cluster (Doesn’t matter if it’s base or type-s)
3) Red transparent tape/transparency/cellophane
Reasons for recommendations:
1) Wiring the cluster to the RSX will be a LOT easier with existing plugs from the S2000 cluster. Otherwise, you will have to make your own harness (see below).
2) If you do not want to cut your existing RSX wiring harness, you can take the plugs from the 2nd RSX gauge cluster to make a plug-and-play harness. You can also use the housing to hold the S2000 cluster in the RSX (see below).
3) In the stock S2000 cluster, the RPM gauge, ECT and fuel gauges light up amber. If you would like to red-out those sections, you will need red transparent tape/transparency/cellophane.
Materials needed:
1) 30+ wires of gauge 22-18
2) 60 pin connections if you are making your own harness
3) Plenty of wire taps and butt connectors
4) Shrink wrap tubing to prevent connectors from touching
5) Pipe strapping to mount cluster and mounting hardware
6) Black plastic/foam for shroud
Estimated time required: 12+ hours