No sooner had I posted my query than I found a solution.
Posting it here for anyone that has the same problem
I downloaded the Bravia conf file from this post viewtopic.php?f=15&t=15976&p=76091&hilit=32ex650#p76091
The renderer conf file does not work as is as. I changed line #12 to this:
UserAgentAdditionalHeaderSearch=(BRAVIA KDL.+EX)|(BRAVIA KDL.+[CHN]X)
Saved and restarted PSM and voila...the TV is recognised and mencoder folder appears. Choose the one with subtittles and there you go