The guy at Sears gave me some component cables to go with my new Home Theater purchase.I thought, "Eh, he knows what he's doing." When I went to connect the cables, I noticed that the output (DVD) and the input (TV - it's an RCA 32" tube) connectors are labeled "Y, Pr, Pb" but the cables are labeled "Y, Cr, Cb". When I went to change the scan method (from I to P) the screen said "unusable signal." I made sure the TV and DVD were both compatible with Progressive Scan before I bought them. So what's the deal? Can I just exchange these cables for the "Y, Pr, Pb" variety?