Record only certain fixtures

say I have 4 fixtures in the programmer, 2 vl5's and 2 vl2500's -- I only want to record the vl5s to master1; then the vl2500's to master2. can I do that? (even if it were 2 or more strokes) I guess I've never wanted nor had the need to do this, but it'd make programming "cleanly" on the fly very helpful. I tried selecting just the fixtures, and some other random santex with no avail. Right now I end up programming both into one stack, copying the list, then cleaning it up. Any thoughts?
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