I don't think it's possible to perform PIE/PIF scanning with the 2500/2510 :disagree: . As far as I know, the first NEC drive with this ability was the 3500? (or the 3520? I don't remember exactly..)
Anyway, most NEC drives are not reliable PIE/PIF scanners so for a beginner in scanning I don't think it's a good idea to scan in a NEC.
I'd rather advise you, mew1033, to perform a "transfer rate test" with CDSpeed. ("Benchmark" tab, "Run test" menu, select "transfer rate"). If the reading curve is smooth with no slowdowns, you discs are burnt OK. With this method you won't be able to tell if the burning quality is only acceptable, good or excellent, but at least you'll know that there is no significant problem.
Important: don't perform background tasks during a transfer rate test, this can lead to slowdowns not related to the disc quality at all. As an alternative, if you download the latest CDSpeed (4.51), you can set the program to "real-time" priority in the options, then backgound activity doesn't matter much.