when it comes to the screen where it says:
Upload successful!
Use this as your link [glb]http://www.simviation.com/yabbuploads/yourpic.jpg[/glb]
(replace 'yourpic' with the name of your image) & don't forget to use the 'Insert Image' button in the forum.
copy the url that is in glow above and start a thread in a forum.. in the top you will see a set of buttons to use click on the image button second row 4th from left and it will give you this
[img ]URL[/img ]
paste your URL into where it says URL and delete "URL"
now change the ...yourpic.jpg with the filename that you uploaded the pictures ie
http://www.simviation.com/yabbuploads/mypicture1.jpg
repeat above steps as needed for each picture

hope this helps, hard to get to grips with but youl get there