Avatar thing

Hey guys I need some help with the avatar thing. How do you get it to 150x150 pixels?

i can help you, dont use that. upload the pick here TinyPic - Free Image Hosting, Photo Sharing & Video Hosting and upload it. then use the img code (copy and paste)

It says invalid file when i use the IMG Code for Forums & Message Boards

Ok never mind... i just used the file i got off the internet