after you have uploaded your pictures, you will have x amount in the "manage current attachments" bottom right of reply page, rather than opening it and clicking on each red cross, simply click on the top one, then press your return key, cursor appears underneath, type what you want there, hit the return key, add the next picture, hit the return key,type etc etc
for those members that are not donators, you cant upload pictures directly to your computer, so you need somewhere to host them, photobucket is a good site, once the pictures are added there, simply copy the url, by right clicking