setting fonts-75dpi as the default xfonts

[Florian Fritze]

Hi, how can I set the fonts-75dpi fonts as the default xfonts. If I
install the fonts-100 package, the configuration is set to 100dpi, but I
want to keep 75dpi as the default. If I deinstall the fonts-100 package,
the default is 75dpi, but gimp needs also 100dpi fonts. How can I change
this that I have installed 100dpi and 75dpi fonts and gimp and the
default fonts for X is 75dpi?
Greetings Florian Fritze.