From the same team who brought you Cheatsync comes Construction Builder for GTA LCS, heres the info

The Construction Builder will create a cube out of a specified object and place it in any location you like. The comments indictate the sections of the cube that is created so you can remove sections as you wish. By default the object will spawn directly above the Staunton Safe House (Just turn the cheat on and then off and then turn on Construction Mode and move directly up to see your construction...

Check it all out here --> http://www.gtapsp.com/cheatsync/?page=mkobj