rate
In jaymod there is cg_savedrate xxxxx change that.
zonemegs
1.) You have to change zonemegs in .cfg file. etmain/profiles/xxx/etconfig.cfg and/or etmain/autoexec.cfg
If it not working, try changing com_zonemegs in jaymod/profiles/xxx/etconfig and/or jaymod/autoexec.cfg too
Or
2.) Launch game (without +fs_game xxxx), write /seta com_zonemegs xxx.
-Exit game using exit button in menu.
-Launch game again
-Make sure zonemegs is changed
-join server/load mod
-(vid restart)
-write: com_zonemegs xxx again
-write: writeconfig autoexec
1.) Works definitely.
2.) Been 2 years since i did that, might have missed something
Edit: Solution for zonemegs is under, Read SunLights message