*.nri file place in burning dvd -r/w

[qanda]This thread is about the Toshiba DVD-ROM Drive. Click here to see full specs[/qanda]Hi to all,
i am new here, sorry for this simpl question.
my problem: i use nero burning ROM version and there is a DVD -RW, is after burning one session there on the disc the ISO_dvd.nri file.
the location is normaly only in the tmp-file path under ISO1_DVD.nri or if used UDF1.nru.
is it right that this file is also written to the DVD-RW disc?
at which location (sector on the DVD-RW disc) is this file located and is this location always at the same position?
if anybody knows about this please let me know, it is very important for me!
my privat email account "klaus.nonnenmacher@nontech.de".
purhaps there is some guy from nero support or anywhere knows the special email for this answer.
thanks and have a nice weekend