Hi Logic Guy,
What do you mean by "Sample with Apple Loops"? Do you want to bring Apple Loops into the EXS24 and trigger the entire loop or trigger elements from the loop (e.g. drum hit within a drum loop)?
Turning Green Loops into audio regions can be done a number of ways. Bounce in Place is probably the easiest way, or you can solo the track/region, create a cycle area around it and choose File > Bounce.