it's not as simple as adding a range to the box sizes... It's more a case of knowing the camera depth, camera angle, and the easy part of compass direction (found easily via the compass). Without accurate functionality with all three of those components, you won't be able to achieve near accurate (more so generalized approximates via MMToMs) results. I iterate again, however, to create an object function to detect desired MainScreen objects. Unless you're trying to pick up items from the floor, or find nearby npc's/players, or looking for MMToMS specific search related influential objects, I'd avoid trying to implement MMToMS as it won't generate as much as a tile system would in other bot clients.
Edit, Also, to help point you into my intended direction as described earlier about object finding, I'd suggest looking into some of Runaway's old object search functions, or perhaps looking through popular scripts (I think superuser has a quality object finding method in his miner), and learning from what those have to offer. There are also nifty scripts that detect fish spots (perhaps @
Flight; might be able to offer insight too :] ), so learning from what these other scripts look for, and breaking down what logic resides behind the code for object finding, can result in desired precision object finding such as detecting fish spots.
Pardoning myself, I indeed wish you success, granted I'm still somewhat hazy on what you're trying to accomplish aside from charting the RS main screen into boxes.
Also, I'd still love to help in any way I can granted your further request.
Ciao,
Lj