xubuntu, 800x600 display: fonts ugly

[Mihamina Rakotomandimby (R12y)]

Hi all
I have a 800x600 display that is quite ugly:
http://www.infogerance.us/Members/infogerance/misc/ubuntu-800x600.png/view
(it an XFCE desktop, the one in Ubuntu 7.10)
I have those font installed:
      gsfonts
      ttf-arabeyes
      ttf-freefont
      ttf-indic-fonts-core
      ttf-malayalam-fonts
      ttf-mgopen
      ttf-thai-tlwg
      ttf-unfonts-core
      x-ttcidfont-conf
      xfonts-100dpi
      xfonts-75dpi
      xfonts-base
      xfonts-encodings
      xfonts-scalable
      xfonts-utils
      xfontsel
      xlsfonts

I join you my xorg.conf.
I think I have not installed the needed fonts, but would need a bit of 
your help in order to know the right thing to do.
Thank you.

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