Simple Design

I have a question about Windows 7. How do you guys change the icons on everything? I want to customize my icons easily but dont know how.

Alright everyone, I've got a question for you. What shell do you use and why?

If you can give pro's and con's to it, please do so. This is everyone's opinion and nothing shall be ridiculed.

I'll tell you what I use. I use bblean on my Windows 7 .
Pro's: Faster than explorer.exe, very customizable, less screen space
Con's: Less support for certain OS, Doesnt seem to like many plugins, support for development seemed to stop

So yeah, tell me what you think.

So I have a Dell Desktop which allows me to install from USB. I was wondering If I should move it to windows 7 or stay with Windows XP?

Specs:
Dell Dimenision 3000
Intel Graphics card [2006 standard]
SoundMax for audio
Intel Pentium 4 2.8 GHz
2GBs of RAM

Harddrives:
Internal:
80 & 40 GB
External:
320GB

So whats your opinion?