How does one unclog catalytic converters most easily?

[crazypete]

I wonder how much exhaust gas I will have to divert to get my car to seem clean. I was thinking of getting clever and

A. Reattaching the cross over pipe behind the heads (cutting off the one way valve) and diverting the gas somewhere (fender?)

B. Clamping a hose onto the exhaust pipe airtube (now under positive pressure) and likewise diverting some more exhaust elsewhere.

Do I need the airpump or will these tricks be enough, ya all think?

I know an open minded mechanic, but it seems that in these dark days, even the open minded mechanics are starting to get cautious