Hi Taylor,
I haven't done this, but if you look at the NI-RFSG VI Reference Help (Start >> Programs >> National Instruments >> NI-RFSG >> Documentation >> NI RF Signal Generators Help), and
then look at Programming >> VI Reference >> RFSG VIs >> Generation Configuration >> Configure Waveforms >> niRFSG Write Arb Waveform, you'll see that one of the parameters is "name" -- so you can put them in and name them whatever you want (there's a list of reserved words).
Then you can use scripting or programming to choose which one to use.
By the way, make sure you have the latest version of NI-RFSG:
http://digital.ni.com/softlib.nsf/webcategories/86256C220055D6BC86256C24002C4ACF?opendocument&node=...That'll get you to the latest versions of RF stuff page, if you don't have the latest version (currently 1.2), grab it first.
Thanks!
berto