to add to this forum:
i can get dvd-r disks at a very reasonable price here on a tiny mediterranean island, and dvd+r disks are 50% more expensive. $12 (dvd-r) vs $21 (dvd+r) for a pack of 25 blanks.
i too have a similar confusion. nec 3500, usb 2.0 connection, (see my signature) and whenever i make a bitsetting (booktype) change in winflash it goes back to read: "factory default",
but in fact did change as i just burned a dvd-r
winflash shows device as dvd+r though, above the change option.
used dvd decrypter newest version and i guess that helps though,
in options for various booktypes,
i do not have the dvd-r option to choose from only dvd+r variations.
yet, according to dvd decrypter,
nec is set to dvd-r as it indicates and i did burn just now.
this information conflicts with the winflash information
as it shows setting as dvd+r.
go figure. :-/
robert in gozo