gs ?
 

I HAVE A Neo 2.5 DVD-Key
PS2 V4 & GS2 1.6 & GS2 2.1
IT SAID I NEED Need AR2 or GS2 1.71, 1.91, 1.93 version as a swap disc.

CAN I USE Game Shark 2 v1.8 upgrade DISC TO BOOT A DVD-R

not sure let us all know if u find out
http://www.pacificnet.net/~huyhoang/gs_ar/
u can download gs1.9 here its what u want
u have to boot origanal ar that u have then swap copy gs u dowload then swap as normal for dvdr
extra swap but it does work