Default Can anybody provide my Rascream for Nexus S

Can anybody provide my Rascream for Nexus S

i want to install that rom.. i have heard that, rom provides good battery back up

Please if anybody have back up or find any download link.. Please send me thanks
Device History : Nokia 1280 > Samsung GT-3630 > HTC Diamond > HTC Elf > Samsung Chat > Samsung Wave 525 > Lg Viewty > HTC G2 > Sony Ericsson X10i > Samsung S Duos > HTC Sensation > Galaxy S Advance > Samsung Nexus S > Samsung Galaxy S3