You can do what you want by using a junction.
First go here and download the program Junction.
Unzip it and put the junction.exe in any folder. I use C: since it is easier to navigate to, in the command
prompt. Just type CD\ and you are in the root directory (C:)
Then create a folder on your larger drive say G:\Activision
Copy the Contents
of C:\Users\Admin\Appdata\local\Activision to the new Activision folder.
Rename C:\Users\Admin\Appdata\local\Activision to C:\Users\Admin\Appdata\local\Activision_orig
Then open a Command prompt as administrator (right click on the command prompt icon and select "Run as administrator")
Now Navigate to where you put the junction.exe (CD\ if you put junction.exe in C:\)
Junction "C:\Users\Admin\Appdata\local\Activision" G:\Activision
Now the game will be redirected to G:\Activision.
You can delete the Activision_orig if you want once the junction is complete.
I always like to keep a copy of the original data just in case.