i think i've screwed up my image file plz help

[mrupset]

i used nero 5.5.9.0 cause i rented out 2 games but had no dvd-rs so i tryed to make an image so i coud keep it untill i got some discs but i think i screwed up. cause i didn't really know what i was doing i put in the origanal, opened nero and clicked on recorder-->save track, and created a *.nrg file, but i can't burn it back to a dvd whenever i load the image back in and hit record it gives me the following error

"sorry, the current recorder supports only the following medium type(s): DVD-R/RW, CD-R/RW, but the compilation can only be written on a DVD-ROM medium. Please select a different recorder"

this was after selecing my pioneer A04 drive,

can i salvage these image files or will i have to re-rent them.