Successfully Re-Restore 5.1.1-5.1.1 on iPhone4[s] using redsn0w 0.9.15b1

1: Open Redsn0w Go to Extra->Even More->Restore

2: Click IPSW And select IPSW

3: If you have SHSH in computer Select local,If your SHSH on cydia click Remote(I did Remote),If you want to submit saved shsh from computer to cydia open RedSn0w go to Extra-> SHSH Blobs-> Submit.

4: Note the Software version(5.1.1) and baseband version(2.0.12) Shown in picture below.

5: Now Redsn0w will start it's work.

 

6: After Completing initial process Redsn0w will popup a message About baseband update,Read and select Yes.

7: Redsn0w start restoring system image.

8: Redsn0w Updating baseband version.

 

 9: Restore Done Successfully

 10: Note the Software version(5.1.1) and baseband version(3.0.04) Shown in picture below.

 Good luck