[Sin-Dee]

I've been looking at the controls list for a while now, but i can't seem to find the alternate combobar key or 'alt', i like to move it to shift instead because it's easier to reach.

And no i prefer to not use a UI addon.

[Fnatik]

No chance, there isn't an option to change the assignment of the bar-swap.
The only way is to try programs like AutoIt or any key remapping tools to remap the alt key to shift.