I made a small (1.21mb) pack that can convert the track03.bin of the Sonic Adventure 2 BETA 03/18/01 gdi release into a selfbootable NRG image to play on a real Dreamcast.
The produced Image is Selfbootable, Sorted and Dummied.
It can be burned with Alcohol (my version of nero [6] doesn't support the tweaks made to the image). To play it on NullDc you got to mount it with Deamon Tools, but you should play the gdi in NullDC anyway.
To use it, extract the pack somewhere, copy the track03.bin from the gdi folder to the pack's folder and run "Do It !!!.bat". Then wait for the Sonic2.nrg file to be ready.
Here's the link: http://www.megaupload.com/fr/?d=4O0IDYRS
I hope you'll find it useful !
Constructive comments are welcome !
FamilyGuy