hm, i got something like
<mount dir="\`188.8.131.52\www\development.local" direxclude=".svn,.git,CVS,bin"/>
but that does not work for me.
i think its because that path is password-protected... i didn't think of that, because explorer has the password saved and its accessible there, sorry.
edit: it works when i mount that unc path as a drive letter, maybe thats good enough for the start