FO OF A CPR HAWKER 800 LOST SIGHT OF TFC TO FOLLOW DURING A VISUAL APCH RESULTING IN OVERSHOOTING FINAL AND TAKING EVASIVE ACTION TO AVOID AN AIRBUS ON AN ADJACENT RWY APCH.

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AT APPROX XA20 AT DEN; WHILE TALKING TO DEN APCH AT 600 FT MSL; THERE WAS EXTREME CONGESTION ON FREQ. OUR ACFT WAS GIVEN VARIOUS AIRSPD RESTRS IN THE SPAN OF 5 MINS. NUMEROUS VECTORS; AIRSPD RESTRS; AND ALT CHANGES WERE GIVEN AND THE PIC (PNF) HAD TO ASK FOR CLARIFICATION SEVERAL TIMES ON AN EXTREMELY CONGESTED FREQ. WHILE ON A HDG VECTOR THAT WAS A L BASE FOR RWY 17R; WE WERE ASKED TO RPT TFC TO FOLLOW; A BAC1-11; IN SIGHT. BOTH MYSELF AND THE PNF (PIC) THOUGHT WE HAD SIGHTED THE BAC1-11; RPTED IT TO DEN APCH; AND WE WERE CLRED FOR A VISUAL APCH; 3 MI IN TRAIL OF THE BAC1-11 TO RWY 17R. AT APPROX XA30 HRS; WE BOTH REALIZED WE HAD LOST SIGHT OF THE BAC1-11 (OR HAD NEVER SIGHTED IT IN THE FIRST PLACE); BUT WERE UNABLE TO INQUIRE ON DEN APCH FREQ DUE TO THE CONGESTION. IN THE CONFUSION; I FLEW PST THE FINAL APCH TO RWY 17R AND WOUND UP PERPENDICULAR TO AN AIRBUS ON FINAL APCH TO RWY 16. I RECEIVED A TCASII RA ON THE AIRBUS AND RESPONDED TO THE DSCNT COMMAND. DEN APCH RPTED AT THAT TIME THAT WE HAD PASSED THE FINAL FOR RWY 17R. I TURNED TO A HDG GIVEN BY DEN APCH AND RE-ESTABLISHED A VISUAL WITH RWY 17R. THE CONFUSION WITH NOT HAVING TFC TO FOLLOW IN SIGHT; LOSING SIGHT OF RWY 17R AND NOT BEING ABLE TO COMMUNICATE THIS ON THE DEN APCH FREQ ATTRIBUTED TO THIS INCIDENT.