Does anyone know how to change an icon?

http://i39.tinypic.com/ekix7d.png You see those small icons at the top of the website? Does anyone know how to change those? Mine still has that standard wordpress.org icon, but I want my own. I never figured how to change them, I don't even really know...

also i don't know how you upload an actual picture of yourself someone please help=]

i forgot

yah trust me i am a girl and when i singed up for this i by misstace clicked male instead...haha

Don't answer if you don't know... Telling me 'Just configure it' doesn't help!!!! I have a mac (imac osx) on a network that I used to use to access a drive that was also on the network. The router was recently changed and where I had the network drive...

does anyone know how can i change that gray square icon that i see at my offline contacts? i would like to have a different image for all my offline contacts. many thanks

I don't have Yahoo messenger installed on this computer. But I want to change my icon. Does anyone know how to do that from web messneger?

I would like to know if there is a program which can help me change my files' icons specifically; ie. for example, a MP4 file has an icon (Say a Letter icon) while another MP4 file has another icon (Say a Number icon), instead of giving both MP4 files...