COMMUTER ACFT CONFUSED BY TAXIWAY SIGNS CROSSES ACTIVE RWY.

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WE WERE CLRED TO TAXI FROM OUR RAMP TO RWY 35. AFTER BEGINNING THE TAXI VIA UNIFORM TAXIWAY TO RWY 35 TO HOLD SHORT OF 27R; I COMMENCED TO TAXI VIA ECHO (WHICH WAS LEGAL CONSIDERING YOU MUST GET ON SMALL STRETCH OF ECHO TO UNIFORM) TO WHAT I THOUGHT WAS UNIFORM -- UNKNOWINGLY I CROSSED RWY 17-35 ON ECHO AND CONTINUED TAXIING. I REALIZED I WAS NOT ON UNIFORM WHEN I DIDN'T SEE RWY 17-35 OFF TO MY L. THE GND CTLR ASKED ME WHAT I WAS DOING OFF COURSE. AT THAT POINT; I WAS IN THE WRONG. FACTORS THAT CONTRIBUTED TO THE INCIDENT. THINKING I KNEW THE ARPT WELL ENOUGH NOT TO HAVE GND CHARTS READILY AVAILABLE. FOS ARE NOT ISSUED CHARTS -- WHICH SHOULD BE REQUIRED FOR ALL PART 121/135 OPS. CONFUSING TAXIWAY IDENT SIGNS (SEE BELOW). GREEN TAXIWAY LIGHTS THAT LIT ECHO TAXIWAY UP. THE MOST CONFUSING ITEM WAS THE WAY THE TAXIWAY IDENT SIGNS ARE SHOWN -- IT SHOWS ARROWS POINTING IN DIRECTIONS TO WHICH THE TAXIWAYS ARE REALLY NOT ALIGNED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. CALLBACK TO FACILITY REVEALS THAT THIS IS NOT A PROBLEM. RPTR STATES THAT THIS HAS ONLY OCCURRED SEVERAL TIMES IN THE LAST 20 YRS WHILE HE WAS ON DUTY. HE ALSO BELIEVES THAT THE TAXIWAYS ARE APPROPRIATELY MARKED.