How to change the base directory?

Hello,

i'm trying to integrate CKFinder into the administration section of my website, but there's one problem i'm despairing of. By default the baseUrl is set to the /userfiles/ directory which is in the /ckfinder/ directory. I want to change it to /files/ which is on the same level as /ckfinder/. My webserver looks like this:

/css
/ckeditor
/ckfinder
 - /userfiles/
 - /fewotherfolders/
/files
/images

Could anybody please help me with that frustrating simple problem? Thanks.