Yes, I just checked KOTOR Tools. The damage dealt is controlled by a script, specifically the k_sup_grenade.nss file. If you want to create a new one, you can reference that file as an example. And you're right, the inate and maxcr columns do not affect the damage dealt.
If you have a problem with the script, feel free to post your questions here. I'll be happy to help.
- Star Admiral