The link is dead!
It looks like parts of alekmaul's website are having problems, including the dingoo section. If you don't mind a 69.63MB download, you can still get ProoSystem 2.0 as part of the Dingoo Mega Pack 2.0 from here
GBC,GBA,GBA SP,NDS,NGPC,Panasonic FZ-10 3DO,NES,Sega Nomad,Sega CDX w/Power Base Converter,PS1,PS2,PS3,Saturn,Dreamcast,PC (Win 98, XP, 7),Dingoo A320,Dingoo A330,Gemei A330,LetCool N350JP,PAP-GAMETA,GCW-Zero SE,Kyocera Rise,2DS,GP2X-F100,GPD G7,JXD 100,JXD A1000,JXD A3300,JXD F3000,JXD V5000,JXD S7300B,Hyperkin SupaBoy
Currently playing: Theatrhythm Final Fantasy Curtain Call (2DS)