I used the 'help' menu in Agent, but it doesn't seem to let me post an
attachment.

In order to post a jpg you would need to essentially convert it to
text. I think a program called uuencode does it.
Then it comes out looking like 15,000 lines of garbage to anyone
reading the articles here. It would make you a lot of enemies faster
than calling CQ on 14336.

Put it another way - the rec.radio newsgroups are text only.

Rick K2XT