SMA PLT TAKES EVASIVE ACTION ON ILS APCH; THEN CIRCLES TO LAND BELOW MINIMUMS.

Narrative

WHILE MAKING AN ILS APCH INTO THE MANHATTAN ARPT (MHK); I HAD JUST BEGUN TO MAKE VISUAL CONTACT WITH THE HIGH INTENSITY RWY LIGHTS. DURING THE APCH; I WAS MAKING TFC CALLS ON THE CTAF FREQ. ZKC ADVISED NO OTHER TFC IN THE AREA; NO OTHER AIRPLANES WERE USING THE LCL FREQ. I BROKE OUT OF IMC AT ABOUT 500 FT AGL AND SLIGHTLY R OF THE CTRLINE. I MADE A LCL CTAF CALL ON A 2 MI FINAL. I OBSERVED NO TFC. MY ATTN WAS INSIDE THE COCKPIT FOR 5-10 SECONDS COMPLETING THE FINAL LNDG CHKLIST. WHEN I RETURNED MY ATTN TO 'OUTSIDE;' I OBSERVED AN AIRPLANE BACK-TAXIING ON RWY 3. THE AIRPLANE WAS NOT MAKING ANY LCL RADIO CALLS. NOT WANTING TO OVERFLY THE AIRPLANE OR LAND LONG ON THE 7000 FT RWY WHICH HAD SOME SNOW ON IT; I ADDED PWR AND FLEW OVER THE MEDIAN BTWN THE RWY AND TXWY. I ENTERED R TFC FOR RWY 3 (WHICH IS REQUIRED BY LCL CONDITIONS). I SAW THE AIRPLANE DEPART RWY 3 AND ENTER IMC. MY PROB: I SHOULD HAVE NOT ENTERED THE LCL TFC PATTERN AT 500 FT AGL. 500 FT AGL IS BELOW CIRCLE-TO-LAND MINIMUMS. I DID SO KNOWING THE LCL AREA VERY WELL (I DID MOST OF MY TRAINING AT MHK). I SHOULD HAVE COMPLETED THE MISSED APCH PROC. (WHICH MIGHT NOT HAVE HELPED CONSIDERING THE DEPARTING AIRPLANE ENTERED IMC WITHOUT A CLRNC). I LANDED WITHOUT INCIDENT AND CANCELED MY IFR FLT PLAN.