Can I use my own uploaded picture in the discussions?

I don't think so. I think you have to upload them every time you wanna using them!!!

i think so. the picture that i upload of me and my son i use it at the parenting interest. so everytime someone started a discussion at the parenting interest i see our picture up there. in sleeping interest i use my sons picture that i took up when he was sleeping. but only you can see that i suppose.

Probably no. You can't change that image