- open your map in eschaton
- in Main Data goto matg tags and select globals/globals. (it's the only one... <_<)
- in meta editing (using entity plugins) goto grenades > grenades: 01 > Short Integers > maximum count
- it should say "4"; type the number you desire and press enter.
- repeat the green step with grenades: 02.
and voillà! you've modified grenades count. >_> have a nice day!