Hi everybody!
1) You can find the icon & GTK & Emerald theme here:
http://www.gnome-look.org/content/show.php/Gray+Dark+Ice+Emerald+Theme?content=73173
2) If you want to customize your shell with colors, you need to modify the .bashrc into your home directory
You can open a terminal and gedit .bashrc & -> you can modify the color prompt section
3) With .bashrc you can easily create some alias or some cmd.
You can look at the end of my file :
//.bashrc
# Calendrier du mois avec le jour en cours en rouge:
alias cal='var=$(/usr/bin/cal -m); echo "${var/$(date +%-d)/$(echo -e "\033[1;31m$(date +%-d)\033[0m")}"'

# les 10 plus gros fichiers/répertoires du réperoitre en cours
alias topten='du -sk $(/bin/ls -A) | sort -rn | head -10'

# change le titre de la fenêtre de la console
t () {
echo -ne "\\e]2;$1\\a"
}


# some more ls aliases
alias ll='ls -l'
alias free='free -m'
alias df='df -h'
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
alias glxgears='glxgears -printfps'
# set a fancy prompt (non-color, unless we know we "want" color)
PS1="\[\033[01;31m\][\u@\h\[\033[00m\]:\[\033[01;34m\]\w]\[\033[00m\]\$ "

//end of .bashrc

If you have some question feel free to email me.