The only thing that i can think of now is the selections sets dialog from the meny bar. But i don't think that that could be implemented. I haven't found anything like that in the maxscript help.
Other than that, i will see to implement a flatten UV dialog that can be used on multiple objects. I imagine it kinda like the standard flatten dialog but embeded in my script and one that will work on multiple objects selected. For example you have 10 objects you want all of them to have flatten mapping with 0.01 spacing and you just clicka a button, a dialog pops out and you apply that to all your objects.
Thats the current plan for the future, ill see how this is possible to do since my maxscript skills are not all that great
If you have any ideas please let me know