I frequently design 6 x 2 metre banners, and Xtreme can't cope with that (i have to put 0.6 x 0.2 metres instead). It's a bit of a shame because frankly, the limitation put inside Xtreme is probably completely arbitrary (I coded a whole graphics suite similar to Xtreme alone, so I'm a bit into coding ... it most probably stores everything related to units as floats or doubles, and those variable types have an - for all practical purposes - arbitrary range. I have no idea what they have been thinking.

But not meaning to bash the software - it's great on the whole