Android 4.1 Jelly Bean ROM FOR GALAXY Y GT-S5360

Folders look exactly like ICS
Custom ROM which looks like Nexus
Fast and Beautiful
Link2SD Application
Animations looks like ICS, you have to activate them via settings (By default, they’re disabled to save battery life)

Your phone must be rooted.
Charge your phone more than 60%
Installing Custom ROM will wipe out all data in your mobile. So, i recommend you to backup all data in it
ClockwordMod recovery should be installed on your mobile

First of all you have to download Android 4.1 Jelly Bean ROM for your Mobile (122MB). Once you have downloaded it on your desktop, immediately proceed to Step 4
Now connect your mobile to the computer via USB. Now copy that custom ROM on the root folder of the memory card. I mean to say to don’t copy it inside any folders
Now Switch off your mobile and you should enter to Recovery mode. To enter in to recovery mode Press and hold Volume Up key, Home button and Power button at a time.
Using volume keys select apply update from Micro SD card and click Skin-1980 CWM.zip. In CWM you have wipe out entire Data and cache in it
Now select Install ZIP from memory card and choose JellyBlastGenED.Signed.zip and finally hit enter
Once instillation process completes, reboot your mobile manually. After reboot you can enjoy Android 4.1 Jelly Bean ROM on Samsung Galaxy Y S5360

Source: http://forum.xda-developers.com/showthread.php?t=1679563