Grand Theft Auto IV Walkthrough

This mission starts out extremely quickly. As soon as you arrive at Jimmy's place in Alderney, in the industrial area of the borough, he'll speak to you very briefly before jumping into one of his cars (which you will drive). He then orders you to a location nearby, on Argus Street, where someone named Chubby Charlie (an enemy of Jimmy's) is located. He gives you two options -- busting through the front doors, or sneaking in via the basement. What you do is up to you. Keep in mind that this walkthrough, however, follows the latter route, through the basement.

Head to the back end of the building (easily accessible via the fenced off alleyway adjacent to the abandoned factory) and access the basement via the sloping pathway as seen in the introductory sequence. Then, look for a hole in the wall on your left that will give you access to a pathway that leads to the building's true basement. As long as you don't come in here with guns blazing, you can actually pull out your sniper rifle (if you have one) and kill one of the two guards waiting near the staircase above. When you pull the trigger, the other enemy will be alerted to your presence, so toggle to a different weapon and take the second enemy out before he can make too much of a fuss. Then, climb the nearby debris to reach the staircase the two now-deceased enemies were so stoically guarding.