PerRock
Engineer
Anything shared on the internet has to be uploaded to a server one way or another (ok not entirely true*, but for the majority of us, it is) Some forums allow you to directly attach/upload images to your posts, however this is fairly uncommon as it puts a lot of load on the forum's servers. I have no idea if AU has this option, I cannot find it.A rhetorical question: why can't you upload them from your desktop?Upload them to a host, I use http://hostthenpost.org/but there are others out there. Then post the URL to the picture.
peter
*If you wanted to not upload the pictures but share them, you'd have to essentially turn your computer into a web-facing server. Doing so isn't advised unless you know what your doing; as it opens up your computer to attacks.