It would be really nice if this module was compatible with native windows align to grid function.
Inventing the align to grid feature again isn't very smart move. Its very buggy and not intuitive (especially on Win Vista and above, where align to grid really work great).
This feature should work live (not on desktop change) and the grid should always be calculated right (now it isn't when you use multiple monitors for example).
My tip is: don't reinvent the wheel - better try to find some workaround for this conflict.