hmmmm
I wonder if you have to do little by little.. Mabye like this
--0/0-------0/1365--------0/2730-------0/4095
0/1536---1365/1536---2730/1536---4095/1536
0/3072---1365/3072---2730/3072---4095/3072
0/4608---1365/4608---2370/4608---4095/4608
0/6144---1365/6144---2370/6144---4095/6144
I am totaly guessing how this might work, but it might go something like this.. Say you want the middle part of the map, you would put in 1365/3072 2370/4608
Try this out and let me know.. I am at work and unable to try at this time.
I might have the numbers backwards, this needs more testing..