[gentoo-user] VIM and colors and the gui on the console or so...

Hi,

I am always interested in the newest version of all new versions
of VIM, my favourite editor. ;)
In recent changes, vim got the ability to render GUI colors on
the console...BUT one needs a
(cite from the vim help pages):

	When on, uses |highlight-guifg| and |highlight-guibg| attributes in 
	the terminal (thus using 24-bit color). Requires a ISO-8613-3
	compatible terminal.

My question is:
Is it possible to make urxvt "ISO-8613-3 compatible" as I either get
a bunch of error messages from vim (guicolors not set) or a colored
vim window...but the colors are extremly bright and variations of
red, orange and yellow....when using the "zenburn" colorscheme, 
which is the true opposite of it.

And -- if urxvt cannot to be convinced to be compatible -- what
comparable terminal is recommended for that purpose...

May there is another vim geek/nerd out there, who has already fixed
that??

Thank you very much in advanced!
:wq ;)
Meino