www.gtamissions.com
he is only the one who can pass the missions without cheating
I can help u too without cheatings
-first you need good guns like AK47 with 300 rounds or UZI with 600 rounds
-second is your agility
-third you need good aiming
-fourth you need to shoot the tires so the cholos will spin
-fifth is you cannot leave Lance far away and must protect him
-sixth you cannot run close to enemies while they are shooting because you need far away so the cholos cant shoot you very well with their bad accuracy
thats all i can help the person who cant pass this mission