Use Odin to install recovery.tar then flash the root zip via CWM.......
CWM Touch Recovery 6.0.1.2 Link:
TWRP Recovery 2.3.1.0 Link:
Superuser, Busybox, Flashable Root zip Link:
Odin 3.04 for Windows Link: Odin3-v3.04.zip
Samsung Galaxy S2 4G USB Drivers:Sprint_L710_GSIII_Samsung_USB_Driver_v1_4_6_0.exe
Not 100 % sure about these drivers, read they work for this phone as well.
Hope this will help get this section going.
CWM Touch Recovery 6.0.1.2 Link:
TWRP Recovery 2.3.1.0 Link:
Superuser, Busybox, Flashable Root zip Link:
Odin 3.04 for Windows Link: Odin3-v3.04.zip
Samsung Galaxy S2 4G USB Drivers:Sprint_L710_GSIII_Samsung_USB_Driver_v1_4_6_0.exe
Not 100 % sure about these drivers, read they work for this phone as well.
Hope this will help get this section going.