So Nero was able to see & successfully write to a DVD+R disk.

Is this the same type of disk, DVD+R, that you had been try to use before with PS8 & WMM?

If you were attempting to use a DVD+RW, did you format it first? Hmmm. Does that apply? If you were using packet writing software, then it would need to be formated. Otherwise, RW media should look like a single write type of media if using (software like Roxio) Creator, or the standard Nero program.

Some softwares need to be updated - with burner drive database updates. I.e., it could be that the particular program, say PS8, does not support your particular drive? Or needs an update for it?