Hi,
I just stumbled across a very old post by Uwe post in an abandoned mailing list
Just thought I´d share this information because it is not in the manual (and I had a hard time before I figured this out...).
If you need Gaussian98-style WFN files (e.g. for Bader Analysis with Xaim or Proaim), you just have to put the keyword $wfn in your control file (job must be finished), then run ridft-proper, rimp2-proper or whateveryouused-proper.
It generates a file named "wfn", which you can then plug into your analysis program.
Have fun,
Nils