how to fix resolution during KDE start (Mandriva)

Linux - Kubuntu 9.04 has a problem. After instalation is used resolution, which is not correctly displayed on some old monitors or you simply wants to have resolution 600x800 because your eyesight handicap.

Here is how to correct the problem.

/home/$user/.kde4/share/config
filename: kcmrandrrc:

[Display]
ApplyOnStartup=true

[Screen0]
width=800
height=600


/home/$user/.kde4/share/config
filename: startupconfig for Mandriva 2009:

#! /bin/sh
# kcminputrc Mouse cursorTheme ''
kcminputrc_mouse_cursortheme=""
# kcminputrc Mouse cursorSize ''
kcminputrc_mouse_cursorsize=""
# ksplashrc KSplash Theme Default
ksplashrc_ksplash_theme="Free"
# ksplashrc KSplash Engine KSplashX
ksplashrc_ksplash_engine="kde4-splash-mdv"
# kcmrandrrc Display ApplyOnStartup false
kcmrandrrc_display_applyonstartup="true"
# kcmrandrrc [Screen0]
kcmrandrrc_screen0_height="600"
kcmrandrrc_screen0_width="800"
# kcmrandrrc [Screen1]
# kcmrandrrc [Screen2]
# kcmrandrrc [Screen3]
# kcmfonts General forceFontDPI 0
kcmfonts_general_forcefontdpi="96"
# kdeglobals Locale Language '' # trigger requesting languages from KLocale
kdeglobals_locale_language="cs"
# kdeglobals Locale Country ''
kdeglobals_locale_country="cz"
klocale_languages=cs:en_US


the coresponding lines are these:
kcmrandrrc_display_applyonstartup="true"
kcmrandrrc_screen0_height="600"
kcmrandrrc_screen0_width="800"