This is step by step guide with images to root and flash cwm recovery on SGP+
the original method is by @blearreaz0n thanks to him
his topic :- http://forum.xda-developers.com/show....php?t=2291865
This guide has two parts, the first is flashing CWM , the second is rooting
Needed files :-
1-USB Drivers >>>> http://www14.zippyshare.com/v/78199247/file.html
2-Odin 3.07 >>>> http://www57.zippyshare.com/v/89558735/file.html
3-CWM Recovery >>>> http://www39.zippyshare.com/v/50102340/file.html
1-Install "USB Drivers"
2-Enable USB debugging...open setting >> developer options >> USB Debugging
3-Extract and open Odine
4-Connect the device to your pc with usb cable
5-Turn off the device then get into Odin mode by holding (power + volume down + home ) a screen should appear
this screen should appear
press volume up
6-In odin at ID:COM section a blue icon like that should appear "0:[COM5]" and "added" in the white box
7-In pda section select CWMRecovery-S5301-20130531.tar.md5 file
8-press start...wait until it say reset
Disconnect the device from the PC, Now you have CWM recovery
Needed files :-
1-SuperSu V1.94 >>>> http://www39.zippyshare.com/v/65031874/file.html
1-Copy SuperSu 1.94 to your memory card and insert it in the phone
2-Turn off the device then go to recovery by holding ( power + home + volume up )
In the recovery use volume up and down to move up and down.. use power to select
3- Select "install zip from sdcard"
4-Select "choose zip from sdcard"
5-Now select the file "SuperSu V1.94" and chose "Yes - install"
6-This should be the result
Now your phone is rooted