sneak input setup in unity3d for the locomotion system

I am working with the locomotion system. i get an error that says sneak input is not set. can u help me with the setting up of sneak in the input manager.

I also have another problem..when i added the leg controller script, the motion group, not used and initialize options are not there. can u help Thank you:) Eva

See this first:

To add new 'inputs', you need to increase the number of them. So click on the number in the 'size' field and add one to it. That should make a new entry at the bottom of the list. Expand that, set the Name to 'Sneak' and then the keys/mouse/whatever to what you want.