Hi ela,
Yes you most certainly can , that's what it is for, to help find homes for un-wanted black cats who get a raw deal.
We are also trying to approach SBC's agent to make sure that it is okay to use the catchphrase etc.as this is a sensible legal precaution? and I'm hoping that we might even get him to agree to a photoshoot holding a black cat in which case it'd make for a great poster. This is only a plan but I do have some experience of dealing with artists through my work and also in marketing. As we discussed in the original CC posting my experiences show that artists are generally very helpfull providing one makes it clear that it is a non-profit making, for charity and that they reserve the right to proof read/listen to the content before publication. With Borat out SBC is much in demand right now and this is extra publicity.
Cheers
Leigh