My idea is to open 2 file and split the windows, in this way you can see two maps.......what Im doing with 2 maps.
Change the size of the maps (both) from 400 to 800
"Group" all objects (box,pyramid,link..bla.,bla)of one maps and move in one side (like -y) of a new map .....Group the second map and move in the other side(+y).save the files
Import one map(file) in the second one.
Now I have one map from two ..bigger.
Ideas:
Change the size, import file, group (pick group and move).
Its to late .......new tomorrow.