I was surprised to find that you can embed xmod:select statements within one another to achieve even more if/then scenarios. I really didn't think it would work (sorry Kelly, no offense intended) as XMP is very picky about tag locations/opening/closing.

pseudo example:

xmod:select
case 1-1
xmod:select 2
case 2-1
case 2-2
else 2-3
/select
case 1-2
else 1-3
/select