By yourself actually... thing is:
People always asked me to share my UI's that i've created for myself - that's what i did =P
There is no other Resolution Preset FOR NOW.
Im thinking of making a tutorial how to set up the mbXtremeUI 3.4.3 for other Resolutions.
The main issue for me is that there're so many addons in your pack that when I try to adjust them myself I never seem to find the right option to move the part of the UI I want to alter... And since my resolution is 1440x900 (same as Maxks) the quickslot bar gets right in the front of my HP/Mana indicators... It's really annoying to play that way (having to rely on the target indicator of your ENEMY to see your own health).
Your UI is awesome man but it'd really make the gaming lifes of a lot of people easier if you could post a tutorial on how to move all that stuff! =)
So... can you do it... please? xD