you can change it to another image, look at graphics section... and then it will replace... use your unique id number to add new picture... you cant get rid as far as i know but you can change it
Put your new pic in a folder and save the pic as your managers ID and make sure its .png
Make a config using fmxml or editing an exsisting one, put the config in the folder too
put the folder in my my docs / si / fm12
Go onto Preferences > Display & Sound. You then need to turn on Display Unique IDs. Then just go back to your manager profile and then at the top it will have your ID below your name.