---QUOTATION--- How do you run? How can you assign a key to running? ---END QUOTATION---
In the koan_user.ltx file change g_always_run on to off and then you can either hold down the left shift button or reassign it. It is bind_accel for running. The current game settings make you run all the time.
Edit: I also had to take some binds from my stalker shoc user.ltx and use them. Like lstrafe. You can also go to the run_alife_all.bat (or whatever .bat file you are using) right click and edit then change the user_koan.ltx to user.ltx. Then it will use the user.ltx file. I guess he was the last one to use the game. The -gpu_nopure fix works if you put it in there also.
---QUOTATION--- How do I turn grass on? I've tried chngeing rs detail to on but to no avail.
grass is not available on all maps, since those maps were not made for showcase, it was useless to compile grass too. only cordon, garbitch and agroprom has grass if i remember well. ---END QUOTATION---
That also explains why only the only maps in your PDA are for those levels.