I found that silk performer 2008 supports flex applications (AMF3 protocol) from the Borland support site.
I have downloaded the trial version of the same.
All other protocols were there except this AMF/AMF3 protocol. Since it is being a trial version, I am not able to locate it. Is it so?
It could be that it is the trial version. I would advise you to go back to borland and ask them about why you can't see the protocol. You should be able to see the Flex/AMF3 support option. Apart from that i have no idea why you are having isses locating this.
To configure scripting for an AMF3 Application, as with AMF0 projects, create a project based on the Web Browser -> Flash Remoting project type.
Due to the tight integration of AMF0 and AMF3 support, this project type works for both AMF0 and AMF3.