DVD burner NEC 2500A is DL compatible!!

NEC 2500A is probably the cheapest full 8x +/-R DVD burner available on the market.
But some users have found additional interesting features to this burner. If you flash its firmware using the one from the NEC2510 model, then the 250A burner is able to burn DL DVD media!!
This story was originally starting from http://forum.rpc1.org/.
You can download this firmware by clicking the link below:
Il est possible de télécharger le firmware en question à l'adresse suivante:
2510K0P2.ZIP
This file is also including a region-free version of this firmware.
Flashing the firmware can only be achieved using a PC under DOS.
CDR Info has performed a burning test on a DL media using a modified 2500A burner, everything worked fine, and the media could be played.
This is a good deal to have a DL compatible DVD burner for such a low price, knowing already that Toast 6 will be soon (in one month) able to manage DL DVD burner.
Warning: it is not clear if this tip will be working on all NEC2500. Some might be defect afterwards, that's a problem to have it replaced since firmware flashing voids the warranty...