Just to keep you updated - I had some success with a bit fresher film (1991 instead of 1987 ) exposed as 12ASA and developed in ORWO negative chemistry. The development time and temp. were as specified for the negative (print) film, and here is a sample of the result:

The chemistry however keeps badly, about a week in a completely full bottle, and isn't really cheap (EUR6 for four films kit). The good thing is that it works well for cross-processing E6 slide film as print, so once mixed, it can do both types of films before it dies.