OK hi,
SO first of all you will need a console to do this.
If you have cracked version you will probably gets console popped up(but i know you all guys have it)
So just write these codes:
1. Use this code to set the score limit : seta scr_war_scorelimit 0 NOTE:You can change war for different gametypes you can use sd,hq,dm....
Than you can change "0" to set how many points you can earn
2 Next you have to do is to set how much xp you will get by killing one guy:
Seta scr_war_scorekill 100000 NOTE:Everything is same as before but don't use "o"
3.Next you can set time limit : seta scr_war_timelimit "0"
NOTE:Zero is always used to describe infinity if you change it it will set summ of minutes played.
Thank me if i helped or rep me.