Thanks,
Sorry, but I didn't write the report and I'm not very knowledgeable about adding selection criteria to Crystal Reports and I don't know how to do that (I'm just the guy that gets the blame for everything). Is that something I can do in Crystal Reports XI R2, do I need a newer version, or do you mean changing code in the screen?
I found the Edit Parameter (below) for this report:
You can see that this is dynamic, not static - does that make a difference to your answer?