@all
i am using win2000, german operating system - i don't know the proper english terms, but you can look for your match: the above path was not wrong at all:
in folderoptions > file names there are some files marked 'n.zutr' meaning not applicable (is there in the english system something like 'n.a.'?) and here you find all protocolls:
n.zutr. URL: CallTo Protocol
n.zutr. URL:FTP (File Transfer Protocol)
n.zutr. URL:Gopher
and so on. here you follow the rest of the above described path.
...but

it still does not work wth me!
there is an extended option asking weather to use DDE. if i leave it the way it is, all ftp:// are still done by IE, if i uncheck the DDE at my next browser start i get a prompt "IE is not your default browser". What now?
anybody with a clue
csant.