Quote Originally Posted by Knoppixster
1. how can I change resolution of 800x600 to 1024x765? I could not find anything relating to resolution on etc/modconf file..
Must be 1024x768 in "Section "Screen"" of /etc/X11/xorg.conf:

Section "Screen"
...

SubSection "Display"
Depth 15
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection

3.can I change it to debian without messing up my current setting?
No. Debian installation uses a quite different configuration in /etc/... The default HD-Installation method is prefered though over Debian-Installation because it installs a multi-user Debian system and additionally leaves all of the Knoppix hardware-detection scripts behind.

Hth

-nohype