This and “View on Flickriver” are my favorite Greasemonkey scripts for Flickr:
Back in Oct 2006 I did a little GM script to automate more personalized replies (used to do it manually with a little bit of HTML). After a long period of neglect, I am trying to work on it again to incorporate some user suggestions.
It adds “(reply with name, icon, icon&name)” links at each of the comments under your photo. When you click on the link, the buddy icon html code will be added into the Add your comment box, where you can show nicely who your replies are directed at. Experiment with preview and you will get the hang of formatting your replies in no time. (Should work on photo and discussion thread pages).
It skips over deleted accounts and only offers the name link if the contact has no personalized buddy icon.
Warning: this might conflict with other GM scripts
v1 initial photo and information is here
v2 bugfixes: for iconless accounts
v2_2 bugfixes: name_reply function now works with apostrophes in usernames & group admins
v3 localization and improved (all credits to mortimer? for this great work!!!)
v3_1 added icon&name reply and presentation changed
v3_2 added Spanish localization (thank you v1m0r4) & fixed iconless detection
v3_3 moved the reply links inline with the comment context links
v3_4 updated code for the new HTML DOM structure on the photo page (does not work in discussion threads)
v3_5 updated by Eric Martin to work on both old and new HTML DOM structure, so it now works in both photos and discussion pages (many thanks Eric!!!)You need to be using Firefox with Greasemonkey extension installed. Then simply click onto the link to my script below and Greasemonkey with prompt you to install,
GM Script: Flickr Buddy Icon Reply v3_5
Williamo's Blog 
Thank you! I’ve been wondering ages why the script wasn’t working.
Finally, it works. Thanks.
I downloaded it and tried it on commenting but nothings there… I dunno if its just my computer or what… I’m using firefox and greasemonkey.. what could be the problem?