I don't know about Flicker, but I upload the pictures I want to post to photobucket into one album, then the links are all the same except for a numerical sequential. I copy one link, replicate it N times and manually increment the numerical sequence until I get to the last link. I always work in Outlook or Word and paste into the browser for better stability and spell checking. You can copy and paste into the reply window and hit preview post to see all the pictures. Then you can edit in Outlook or Word , move the links around or delete undesired pictures and add captions. This is easier if you have two monitors.