Help with assigning Left Button to Phone App

[nameeri]

My Green Phone button no longer works on my mogul and i wanted to assign the left soft button to the phone application. I found the other thread that shows you the location of the registry key that needs to be changed and what values need to be modded.

Create the following keys and Strings in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Today\Keys\11 2
HKEY_CURRENT_USER\Software\Microsoft\Today\Keys\11 3
112 is the left key and 113 is the right.
Set Default to what you want the key to read (ie. SMS)
Now for each key create a new string named Open and set the target path.

What should i set the target path to for the phone application??

If anyone can point me in the right direction, it would be a great help.
Thanks.

[nameeri]

I think I found the answer to my own question

\Windows\cprog.exe

[weedahoe]

You can do it with those reg edits but also a nice GUI'ed app to use is Advanced Configuration Tool which makes it slightly less painless and adds other options also