EDIT fixed links
Download the latest
cdrtools and
cdrecord-prodvd
Open a dos windows (windows 2000: "cmd", windows 98: "command"), find out the scsi host address of your dvd writer (Possible with Nero or, if you prefer,
cdrecord -scanbus), and write:
cdrecord-prodvd -dev=x,y,0 -atip (with x,y being your host address)
This requires a working aspi layer!