DURING AN ILS APCH TO RWY 22R, APCH CONTROL ASKED THE PLT TO KEEP HIS SPEED UP AS MUCH AS PRACTICAL. AT A LATER INTER- VIEW, THE PLT COULD NOT REMEMBER DETAILS OF THE APCH. HE RECALLED PUTTING THE GEAR DOWN AT THE OUTER MARKER (OM) & USING THE AUTOPILOT TO MAINTAIN HIS AZIMUTH ON THE ILS CENTERLINE, BUT MANUALLY CONTROLLING HIS SPEED & RATE OF DESCENT.HE COULD NOT RECALL WHETHER OR NOT HE CAPTURED THE ILS GLIDE SLOPE. HE MONITORED THE RADIO USING HIS HEADSET & ASKED THEPASSENGER (WITH PREVIOUS FLT EXPERIENCE) IN THE RIGHT FRONT SEAT TO MONITOR FOR NO LESS THAN 1000 FT MSL & 80 KTS AIRSPEED. TOWER PERSONNEL REPORTED WHEN HE WAS 1 1/2 MI & 1 MI ON FINAL. THE PLT REPORTED THAT HE SUDDENLY SAW THE RWY AND STARTED DOWN TO LAND. AT ABOUT THAT TIME HE SAW THE RED LIGHTS AT THE DEPARTURE END OF THE RWY & INITIATED A GO- AROUND. SHORTLY AFTER THAT, THE ACFT COLLIDED WITH TREES ALONG A FENCE ROW, APRX 25 FT AGL. NO PREIMPACT MALFUNCTION/ FAILURE WAS FOUND. THE PAX COULD NOT HEAR THE RADIO, BUT SAW APPROX 800 FT ON THE ALTIMETER WHEN THE RUNWAY WAS SIGHTED.