how to do it? if i convert them to jpg/png/whatever, everything is fine. however, doing this with every damn single pcx-file is very troublesome. isn't there a way to load the image from a pcx file?
You could write a PCX loader using the ImageLoader interface and plug it into TextureManager.
too late. i found a jar which can load .pcx into a bufferedimage 
(google -> "jimi")