CPR PIC COMPLAINT REGARDING TRANSIT TFC NEAR PWK ARPT AND LACK OF COM PROCS THAT CREATE A SAFETY ISSUE. POTENTIAL CONFLICT ENSUED WITH ONE OF THE ACFT.

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ORD APCH HAD JUST CLRED US FOR THE ILS RWY 16 PWK OUTSIDE CUTIE INTXN AT 2700 FT MSL. HE HAD CALLED OUT TFC TO US AS A POSSIBLE CONFLICT AT 2500 FT MSL; OUR 2 O'CLOCK; 2 MI. TCASII ALSO GAVE US A TA ON THIS TARGET WHICH WE ACQUIRED VISUALLY. AFTER PASSING THIS TARGET (ALSO INBOUND TO PWK) I STARTED TO DSND ON GS WHEN RA OCCURRED. I FOLLOWED RA COMMAND TO CLB WHICH TOOK ME TO 3200 FT MSL INTO THE CLASS B ABOVE THE PWK APCH CORRIDOR. I DID SEE THE RA TFC WHICH WAS A C172 OR C182 IN CRUISE AT 2500 FT MSL NEAR CUTIE INTXN PROCEEDING E TO W. I TRIED UNSUCCESSFULLY TO DO 2 THINGS. FIRST; I WANTED TO WARN THE GERONIMO (OUR TA TARGET) ABOUT THE RA TARGET BECAUSE I THOUGHT THERE WAS A POTENTIAL FOR A COLLISION BTWN THEM. BUT THE FREQ (PWK TWR) WAS TOTALLY CONGESTED BY PATTERN TFC DOING TOUCH-AND-GOES AND THE GERONIMO CHKING IN. SECOND; I WANTED TO RPT THE CLASS B INCURSION AS A TCASII RA; BUT AGAIN DUE TO CONGESTION COULDN'T DO IT. I ALSO DIDN'T THINK IT WAS PWK TWR'S PROB. IT WAS ORD APCH'S NEED TO KNOW. I LOVE THIS TCASII SYS. THE DAY IS COMING WHEN YOU WILL NOT BE ALLOWED TO BECOME AIRBORNE IN ANYTHING WITHOUT A XPONDER. FOR ME; KEEP THE HEAD OUTSIDE THE COCKPIT. FOR THEM; DEAR GODS; WHAT IS LEGAL TO FLY THROUGH VFR; NOT TALKING; AND WHAT IS SAFETY CONSCIOUS; ARE 2 DIFFERENT THINGS. THE GERONIMO SHOULD HAVE CALLED APCH FIRST; NOT THE TWR. THE CESSNA WAS LEGALLY TALKING TO NO ONE IN VERY CONGESTED AIRSPACE.