Help Lara attack Tyler's gang

After finding a weakness in Tyler's gang, Lara will refuse to pay you unless you join them in the attack.

The gang at the church consist of 5 NPC's, one armed with a Sledgehammer and four armed with 10mm pistols. Stick around long enough to watch Lara's gang cut down Marc, the doorman. You can then talk to Lara to receive your payment.

If you step inside the church during combat or after Marc is dead, you will have to fight the other 4 NPC's, as they will go hostile. Be careful not to hit any members of Lara's gang!

An alternative to the solution suggested in the quest title does exist. When Lara first gives you the quest, tell her you need to prepare, then quickly shoot over to Tyler and inform him about Lara's cunning plan. Tyler will request for you to follow Lara to the church as normal, but turn on her when the battle begins. Doing so will net you the same 1000 experience points and some negative karma.

Fallout 2 Restoration Project changes
After the church guards are dead, you can talk to Lara and get teleported with the gang to Tyler's party where the drunken remnants of Tyler and his gang may be disposed of.