GA SMA UNAUTHORIZED RWY XING AT DWH FOLLOWED BY UNAUTHORIZED PENETRATION OF IAH TCA.

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I RENTED AN AIRPLANE FROM FBO FOR THE SOLE PURPOSE OF FLYING TO HOUSTON HOBBY FROM DAVID WAYNE HOOKS; AND BACK TO HOOKS. THE PLANE IS AN SMA. I GOT ATIS; THEY WERE USING 35L AND 35R; THEN GND TOLD ME; TAXI TO 35L AND HOLD SHORT OF 35R. SEE ATTACHED DIAGRAM. I TAXIED PASSED 35R AND HELD AT THE TAXIWAY. GND CTL SAID 'ACFT IDENT CONTINUE.' AT THIS TIME I REALIZED WHAT I HAD DONE. I TAXIED IMMEDIATELY. MY ONLY EXCUSE IS THAT 35R AND 17L LOOK JUST LIKE THE TAXIWAY; THEY ARE THE SAME PAVEMENT; COLOR AND WIDTH. I THOUGHT I WAS HOLDING AT THE RWY WHEN ACTUALLY I WAS HOLDING ON THE TAXIWAY. (NEXT) AT TKOF I WAS CLRED FOR A R TURN; THIS PUTS ME E ON A R XWIND LEG THEN I TURN R DOWNWIND WHICH IS S; CLBING THE WHOLE TIME. I ASKED THE TWR IF I MAY RECEIVE FLT FOLLOWING TO HOBBY; HE ADVISED THE FREQ IS 123.8; AND HE SUGGESTED THAT I MAY WISH TO CHOSE AN ALT LESS THAN 1800 FT. AT THIS POINT I LOOKED AT THE ALTIMETER AND IT READ 1900 FT; SO I RETARDED THE THROTTLE AND DSNDED TO 1700 FT. I AM NOT SURE IF TWR SAID THAT BECAUSE I HAD ENTERED THE TCA OR BECAUSE I WAS HEADED THAT DIRECTION AND I'M NOT SURE HOW FAR S OF HOOKS I WAS OR IF I WAS OR WAS NOT IN THE TCA. WHEN I RETURNED THE AIRPLANE THE MGR OF FBO CALLED ME IN HIS OFFICE AND TOLD ME THAT HE GOT A CALL FROM TWR; THEY WERE UPSET AND HE WANTED TO KNOW WHAT HAPPENED. I'M NOT SURE IF I DID THE RIGHT THING BUT I THOUGHT I SHOULD WRITE YOU. IF YOU NEED ANY MORE INFO FEEL FREE TO CALL. THANK YOU FOR YOUR TIME.