Since the original mod is no longer available for download, by popular demand I have used the source code files provided to make this mod 0.25-ready.

All credit goes to FlaccidUnicorn.
Here is a video demonstration he made. 

ENTER EVA CAMERA: Press – and = keys, or by right-clicking on Kerbal and pressing Activate Camera.

LOOK AROUND: Right-Click and drag (view re-centers on release of right mouse button).

ZOOM: Scroll the Mouse Wheel or Numpad + and – keys.

EXIT EVA CAMERA: Press V to change to standard flight cameras.

The setting EVA_ROTATE_ON_MOVE = False in setting.cfg will allow you to pitch with your mouse and keep that orientation when you use WASD to translate.

Chatterer's breathing sounds (customizable) increase immersion and go well with this mod.

Watch your step. 

If FlaccidUnicorn or someone else skilled wants to make an update the mod, I would be happy to pass on the torch to them.
I am not the most qualified person to do so myself to say the least, but no one else seemed interested in maintaining this mod.

Related mods:

KerbTrack EngineTuneControl The Renaissance Compilation PuntJeb [1.4] PersistentRotation Rover Anti Gravity System Mouse Aim Flight Time Control 2.0