I suppose that you won't pay any attention to this, since it's been pointed out to you before, but it's not necessary to spend hours to get the EFC.

hifi-remote.com/sony/Sony_dvd.htm lists the Sony command numbers.
hifi-remote.com/jp1/lookup/  gives you the setup codes which correspond to the device.subdevice numbers, and which can therefore be modified via EFC, in case you didn't already have a setup code.
RemoteMaster allows you to convert the command numbers to EFCs.

Surround is command number (OBC) 90, which corresponds to 224. 

The above link shows possibilities for Zoom on a Sony DVD.  I think "HD Zoom" is a label on a button on a Comcast remtoe.