Lothar,
We use ACAD 2000i. I was looking at the autodesk website this morning and found this: http://usa.autodesk.com/adsk/servlet/ps/item?siteID=123112&id=2889789&linkID=2475323
It talks about "Text display with complex linetypes", and says to write a lisp. Is this the kind of lisp you were...