I know this is an old post and all, but I just can't get this damn thing to work!
I downloaded the Saint's Row 4 Sandbox+, installed the necessary files to the game directory then edited the sr3_city.lua file exactly as you instructed. But when I start up the game, my character remains at normal size. I don't understand wtf I'm doing wrong?! >.< Please help! D:
You need to push the buttons according to the original post http://www.saintsrowmods.com/forum/threads/sandbox-for-saints-row-iv.4651/