You cant do it via Quick Reply. Well i cant anyway.
If you would like to upload a picture to a post or topic go to 'Reply to Topic' and then clcik on the little paper-clip where it says 'INSERT AN IMAGE FILE' in the top left hand corner, browse through your documents to find the specific image and double click it.
Then hit the "upload to 'coaster mad's" post and then your done.
It must be in the right format for this to work though.
If you dont know how or wtf that is. Just rename the picture to whatever it is and then put a .JPEG on the end.
Always works for me, hope i am some help dude.
EcG[:)]