CAPT OF A SAAB SF340B (SF34L) EXCEEDED THE MAX CIRCLE TO LAND SPD STIPULATED IN THE STANDARD APCH PROC DUE TO A DIFFERENCE OF OPINION BTWN HE AND THE CHK PLT RIDING JUMP SEAT. A SUCCESSFUL APCH AND LNDG WAS MADE AND SUBSEQUENT REVIEW BY THE RPTR PROOFED THAT THE SPD WAS EXCEEDED BY 2 KTS.

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THIS FLT WAS FROM DFW TO ILE AND WOULD TERMINATE WITH AN ILS TO RWY 1 CIRCLING TO RWY 19 DUE TO WIND CONDITIONS. ULTIMATELY WHAT HAPPENED WAS THAT I FLEW THE APCH INCLUDING THE CIRCLE PORTION AT AN AIRSPD IN EXCESS OF THAT ALLOWED FOR THE ILE CIRCLING APCH PROC. THE MAIN REASON THIS HAPPENED I BELIEVE WAS BECAUSE MY COMPANY RECENTLY CHANGED ALL OUR PROCS AND FLT PROFILES. THEY CHANGED THE PROCS; THE AIRSPDS WE FLY AND THE TERMS USED TO DESCRIBE THE AIRSPDS USED AT VARIOUS STAGES OF THE APCH. THEY GAVE US NO TRAINING ON THESE NEW PROCS; THEY JUST GAVE US A NEW BOOK AND SAID GO TO IT. ANYWAY; WHAT HAPPENED WAS THAT DUE TO ACFT WT WE WOULD HAVE TO FLY THIS APCH AT 142 KTS UNTIL LEAVING MDA. THE COMPANY CALLS THE SPD WE FLY THE APCH; INCLUDING THE CIRCLING PART VMM ONLY AFTER EXTENDING FINAL FLAPS AND LEAVING MDA DO WE SLOW TO THE SPD THAT IS CALLED VAPP. I WAS THE PF AND WHEN THE FO GAVE ME THE VMM SPD OF 142 KTS I LOOKED AT THE APCH AND SAW THE MAX ALLOWED SPD WAS 140 KTS SO I THOUGHT I COULDN'T DO THE APCH BUT I WAS UNSURE. I HAPPENED TO HAVE A COMPANY CHK AIRMAN ON MY JUMP SEAT SO I ASKED HIM WHAT HE THOUGHT. HE SAID THAT VAPP WAS BELOW 140 KTS AND THAT'S WHAT MATTERED SO CLRLY HE WAS CONFUSED; TOO. HOWEVER; IT SOUNDED GOOD AT THE TIME AND SO I SHOT THE APCH AND WE LANDED WITHOUT PROBS. IT WAS ONLY LATER UPON FURTHER REVIEW THAT I DETERMINED THAT I HAD FLOWN AN ILLEGAL APCH.