For anyone interested, here is a link to the CRX-UK Owners Group. Under the Downloads section there is a link to a UK CRX Workshop Manual.pdf (~17Mb).

http://www.acute.f9.co.uk/crx/

Page 14-48: Seats, Rear Disassembly
(assembly would therefore be the reverse of disassembly)

Page 14-50: Seat Belts, Rear Replacement

Pass it on!!!!