Hey there man. I take it you're asking about your avatar, the pic that shows up next to your username on your posts? For that, you go to your User CP (upper left corner). Click on that and go down to "Edit Avatar." From there you can either use one of the custom ones or upload a pic from your computer. As for people replying to your threads, at the top of each thread page you will see a tab "Thread Tools." In the drop down menu, you will see the option to subscribe to the thread where you will get an e-mail notification when someone replies. Hope this helps and if you need anything else, feel free to ask!