alreadt tried that
but seems that it's not

chcking that files tells the default configs only
in other words: doen't get changed by changing the color settings
thanks anyway

//EDIT
i suspect this:

/var/lib/gconf/apps/osso/xterm/%gconf.xml


//EDIT2 :

Wowoo
found it

ex :
gconftool-2 -s /apps/osso/xterm/font_size -t int 16

//EDIT3

Just fixed it

i will post some screen shots

will update it tomorrow
stay tuned

//EDIT4
just posted screenhots
PS: if you wonder why you can't get the white one loading well
just wait till tomorrow so i can have a chance to update ir