to put a pic on ur profile;
[img]http://images.marapets.com/avatars/invisible.gif[/img]
[img]________URL HERE_________________[/img]

to add colour to your text on your profile;
[color:__a color here] TEXT TEXT TEXT TEXT TEXT TEXT TEXT TEXT [/color]

to add different sizes to your profile writing:
[size=number] TEXT TEXT TEXT TEXT [/size]



hope this helps out a bit!