On the RT10 it should be easy, i installed one on my GTS a few years ago. The seat is real easy just remove the four bolts and take out. Remove the stock base and install the lowering kit.
The only problem I had (and it was a big problem) was the weak chain that pulls the tooth out when you adjust your seat forward and back. You might want to try and reinforce that. What happened was I installed the lowering kit, put the seat back in, when I tried adjust the seat back, it stretched the chain so it couldn't pull the release that allows the seat to go forward or back. I found out latter when I intalled a kit on my SRT10 (and had the same problem) that many people had the same complaint.
Brad