How to flash rom on galaxy tab 2 p5100 10.1

First turn off your galaxy tab 2 gt-p5100 10.1 inch

Then prees on power button and volume up button in the same time until your galaxy tab is open then press the volume down button to get into download mod

Then dopen odin in your computer 
The odin download link
http://goo.gl/PYZ2L

First open the program 

 yellow colur will appear
when connect your tablet to the computer
Don't mark re-partion

Then click pda and choose the rom then click start to flash the rom and when it is done a green colour will appear and then you can un plug your tablet and enjoy using the new flashed rom