I use a varient of the rules presented in Cyberpunk 2020 by R. Talsorian Games.
The martial arts styles in Cberpunk can be easily converted. Just use the normal CODA rules but add the maneuvers from Cyberpunk. The styles simply give bonuses to certain maneuvers. In my conversion you buy skill levels in a style which gives a plus 1 per level to unarmed combat skill, max 1/2 unarmed combat skill.
As to the knockout problem I require a Stamina check with a TN of 10 with the appropriate penalty for the wound level. I also use the hit location chart form Cyberpunk with the rules that head shots do 2X damage and shots to the limbs require a stamina check with a TN of 5 per the number of wound levels sustained.
Example: victim with a health of 6 takes 6 points to the arm, a stamina check of 5 is rquired. If 18 points had been taken the TN would have been 15, etc..
Failure of this check severs or otherwise mangles the limb to the point it requires replacement.
And to anyone who says thats too gory and realistic for Star Trek, I say tell it to Nog.
4. Shooting is not too good for my enemies.
Evil Overlords Survival Guide
There are few problems in the galaxy which cannot be solved by a suitable application of concentrated phaser fire.
Capt. Coryn Windsabre
I've always preferred photons myself.
Cmdr. Marcus Aurelius Ferretti