Actually, it went quite easily. Filled in Sections 1,2,3,4 & 9 as indicated, section 4 being my patents details and dates, but the Agent said it was not needed as neither was counter-sign of photo, thank God.
OK, copies of EVERY page of old, washed-up Passport. Luckily, I had scans of all the main pages stored on PC. WHY do they want copies of blank pages? Copies of Thai DL and ID for address confirmation. Whole job took two hours, and a ream of paper and Bht 12000! Sent it off to Thai Visa Express just a while back. See what happens.