Stupid Invaders. What to do, when a file is 900mb !!!

[segaplayer]

Hi,
I've ripped and extract the game and got a file named "stupid.dat", that is over 900mb. What i have to do now. It's also the same problem with the second disc. Is there a way to split this file?
Can someone help me, plz? :-(

[Sleeper]

go to www.internetconvoy.com and look in GUIDES/DOWNSAMPLING

[segaplayer]

Thanx :-)

[segaplayer]

Hi again,
its not working because its not a file like afs or adx, its a file named: DAT (Stupid.dat). Do you know how i can downsample it.
Ive looked to the site too but it doesnt help.
Can you help me please?