FLASH S002 IPS ROMS IN S003 BASED IPS DEVICES:
METHOD 1:
USING PATCH >>>

Installation Instructions :

RooT You Mobile First If Not Rooted

Go To Recovery Mode :
Switch off the Phone Press and hold "Volume Up + Power"  Buttons Select Recovery Mode by Volume Up and Proceed to Recovery by Volume Down

CWM:
1. - wipe data factory reset --> Yes--delete all user data  
2. - wipe cache partition --> Yes--Wipe Cache   
3. - advanced --> Wipe Dalvik Cache --> Yes--wipe dalvik cache    
4. - mounts and storage --> Format /System /data /cache

5. - install zip from sd --> - choose zip from sdcard --> - Select ROM Zip
6. - install zip from sd --> - choose zip from sdcard --> - Select PATCH Zip

7. - reboot System now 

DOWNLOAD S003 PATCH

METHOD 2:
USING BOOT.img 

1. - Open any S002 ROM.zip using winrar 
2. - Delete "boot.img"  from the ROM.zip 
3. - Download the s003 "boot.img" from HERE
4. - Drag and Drop the Downloaded "boot.img" file to Winrar Window(REPLACING THE BOOT.IMG FILE)
5. - Copy the modified ROM.zip to the Sdcard 

Go To Recovery Mode :
Switch off the Phone Press and hold "Volume Up + Power"  Buttons Select Recovery Mode by Volume Up and Proceed to Recovery by Volume Down
CWM:
6. - wipe data factory reset --> Yes--delete all user data  
7. - wipe cache partition --> Yes--Wipe Cache   
8. - advanced --> Wipe Dalvik Cache --> Yes--wipe dalvik cache    
9. - mounts and storage --> Format /System /data /cache

10. - install zip from sd --> - choose zip from sdcard --> - Select MODIFIED ROM Zip(FLASH IT)

11. - reboot System now