• replace tabulation with space :

set expandtab

• To convert existing tab in spaces :

%retab

• Change colorscheme :

:colorscheme schemename 

emerge colorschemes
emerge searchcomplete
emerge supertab

First at all, you need a 256 colors enable console. Are known to works :

• rxvt
• Xterm
• urxvt ??

And they must be compiled with the 256colors options. To check it out :

rxvt --help

It give all the options compiled.

To enable the 256 colors in Vim :

set t_Co=256

~/.gvimrc :

set termencoding=iso8859-15
set t_Co=256
colorscheme bmichaelsen 
set guifont=Bitstream\ Vera\ Sans\ Mono\ 10, Terminus\ 9 
set lines=60 columns=160

Install the colorschemes package :

emerge colorschemes

To load a colorscheme from vim (e.g. inkpot) :

:colorscheme inkpot

Get the plugin Here and drop It in ~/.vim/plugin/ folder.

To fix the arrow keys problem in iterm, in the main bar go to bookmarks > manage bookmarks. Edit the default profile and set the keyboard layout at global.