Lee,
Thanks for the reply.
1) Bricscad doesn't have the ISOLATEOBJECTS command. Bummer, b/c I think that would've solved the problem fairly quickly.
2) Bricscad doesn't have a DXF VISIBILITY FLAG, either. However, the little code snippet you posted did work out tremendsously. My supervisor is a LISP guy and he kinda showed me how to execute this particular code. One thing though, why couldn't there be a way to explode those PARTICULAR BLOCKS (in this case there were 62), and then turn off those layers? I'm assuming this is probably 2 or 3 more steps in a LISP script?
Thanks again, that was definitely a bonus.