for making it your profile pic (top left)
1. right click on the icon you want
2. save picture as...you can change the name if you want
3. go to your xanga then go to public profile then profile pics
4. click on upload profile pics
click on browse and find where you saved it

for putting an icon in your post...
1. Right click on the icon and save picture (click on save picture as...)
2. make an account at photobucket.com for free and upload it
3. Copy the text in the url slot underneath the icon picture
4. in a new entry, above the box that you write in, theres a box that says 'pic'. click that and paste the url that you copied.