To answer each question above...

Yes we can change the blue light thing icons...I wasn't thrilled with them myself. It is simple to do once I/we settle on a good replacement. I'll look for some today or tomorrow.

Other question. I believe it should be no problem to edit your pics on your replies. Just click the edit post icon near the post and it should allow you to change/edit text and change what picture you posted. I think you may need to re-upload a new pic during editing so it replaces the old one as I have not experimented with this feature yet.