BEFORE YOU BEGIN YOU SHOULD ENSURE THAT YOU HAVE THE MOST RECENT OPERATING SYSTEM ON YOUR PHONE (official or leaked). THERE IS NO GUARANTEE THAT THIS WILL WORK ON YOUR DEVICE BECAUSE THIS SOFTWARE IS BETA (Not Released).
No pictureshere, just download the zip file...remember where it downloaded to we will need to go back there.
Open the zip folder and extract all contents to a folder name you can remember. I extracted mine to a folder called bbm.
Open Windows Explorer (I'm assuming you know how) and navigate to the folder where you extracted your new messenger files (mine is bbm)
Navigate to the For 4.7. 0 (or whatever your folder is) and move the cod files so that they are in the same folder as your alx file (see above, I just moved the cod file and the english cod file.)
Plug in phone and run DM (No pictues here sorry)
Select Application Loader
Select add/remove application by pressing the start button.
Select Browse and Navigate to the folder that you made and put the blackberry messenger alx and cods files. (I navigated to my documents and then bbm)
Select the file Blackberry_Messenger alx file. and press open
After you finish step nine you are nearly home free. The next step is to press the Next Button and DM will install this file and reboot your Blackberry.
If you still need assistance please post the followng information in your post:
1) Blackberry Model
2) Operations System - found in options ----> about
3) Phone Carrier
4) Error Message / or situation.