Error occured while flashing Galaxy Y with JELLYBLAST V3.0.2 While installing ROM on my galaxy Y as per mentioned on [ CUSTOM ROM - KERNEL] JELLYBLAST V3.0.2 for Galaxy Y GT-S5360

ROM installation aborted with error:

Finding update package...
Opening update package...
Can’t open /sdcard/JELLYBLASTV3.signed.zip
(bad)
Installation aborted.




Recovery.log

-- Installing: /sdcard/JELLYBLASTV3.signed.zip
Finding update package...
I:Update location: /sdcard/JELLYBLASTV3.signed.zip
Opening update package...
minzip: Missed a central dir sig (at 0)
E:Can't open /sdcard/JELLYBLASTV3.signed.zip
(bad)
Installation aborted.
This error comes normally for two reason. 


You have a corrupted .zip so you should try re-downloading.
You have an unsupported recovery. 


According to your ROM's requirements, You must have stock kernal. Most of the time while rooting, we flash a different kernal. So you may have to flash your stock kernal back again.
And also you must have a CWM recovery, as they say.  You can find it here http://techcure.wordpress.com/2012/10/17/how-to-root-and-use-cwm-for-galaxy-y-gt-s5360/ 

If you have already done these steps, please let me know. I will try to help as much as I can.