To start the quest, the Vault Dweller should head over to the Crash House hotel, there after witnessing the death of a Skulz ganger in the Skum Pitt. Head to the back room and talk to Vinnie. When the Vault Dweller asks to join the gang, Vinnie will send him on an errand to steal the urn holding the ashes of Neal's wife. The Vault Dweller should then go back to the Skum Pitt after it closes, enter through the unlocked side door, take the urn (which is on the bar table) and return to Vinnie. Giving him the urn earns XP and negative Reputation.
If the Vault Dweller completes the Bust the Skulz quest the violent way, they can loot the urn back off of Vinnie's corpse and give it back to Neal. Neal will be so grateful that he'll promise that the Vault Dweller will never have to pay for a drink in the Skum Pitt ever again, and the Vault Dweller will get +2 Reputation.