Modify all instances of interactions between a particular transcription factor and all target promoters?

edit

Hi:

I've got a particular transcription factor and target binding sites associated with a promoter identified throughout the genome. Is it possible to change the regulatory interaction, for all binding sites, from "Unknown" to "Repressor", in one fell swoop instead of marching through the TF's regulon and changing each interaction, one-by-one, using the Regulatory Interaction Editor? Lisp code would work just fine if necessary. Thanks.