This one requires you to do the following:
Rob House, 102 FYI, you can take the painting in by just opening up the passenger's side door, and it should automatically place it in.
then get in your car, drive straight, and then take a right. Once you're at the "new hideout," run straight and then right until you find that computer. Once you have done what it wants you to do,
Go back to the car, then the pawn shop, then sell all the crap you have already got, then press tab and buy Marking Skill, then make your way back to the street, where now you're going to want to break all the green diamonds, loot 102, and run away from the police through the back gate you should have broken before they came!
Once you've done the above, you're going to want to go to the P & wait until 5 a.m. Now it's 5 A.M. Go and learn 103's work habits, then get in the car, drive to the pawn shop, unlock the lock-picking skill, and sell all of your crap a second time. Now go back to the hideout and buy a lock-pick from the PC, then go to the front room and use the lock-pick on your new lock on the right shelf.
Then drive back to Madison Street and wait until 5 a.m. Once it's 5 a.m., rob the first house again (you're going to want to do this a lot), and once it's between 6 a.m. and 6:30 a.m., pick 103's lock, rob the guys home, and find that code (it's in the bedroom on the desk)! Break the gnome in the back garden as you have a mission from your PC. You also have, like, 50 dollars on the garden table.
You never needed the brick. Unless you used it to break the gnome, after that, drive towards house 101 and go to the golden S on the map, and then drive home. and buy the pick-pocketing skill. Once you have done the mission and sent the package on the doggy website, go into the living room and practise your pick-pocketing on the dark mannequin. Once done, head back to the car and go to the pawnshop to resell all the stolen goods.
then head back in to town and wait for 110 to go in to his home or go through a window in his house, as after he does his garden, he goes and sits in the back facing the fence. Once you have done that, rob him silly (I got caught robbing the TV as he ate dinner). Once you have robbed the house and found the note in the bedroom by the door for the parcel code, continue on with the mission (the stash is in the basement).
then go next door; there are two tenants who live here. Just rob the house bank and then head back to the hideout to see the broker kind of guy. Once you have given the stuff to the black market guy, go to 104 and rob the package. Take it home.
Achievement Unlocked!!