nytro21
First of all, welcome to the RX and thank you for registering. I hope you have been enjoying the site. Now, as to your question, please follow the instructions below:
On the toolbar above, click on the white arrow just to the right of Forum Actions. This will give you a drop down menu. Click on Edit Profile and a new window will open up. Under the heading My Settings scroll down and click on Edit Avatar. Another window will open up showing instructions for Custom Avatars or Pre-Defined Generic Avatars. There are two Options to add Custom Avatars you can choose from. Once you have decided on an avatar make sure you click on Save Changes and you should be all set.