E-Life is a totally effortless mod, you are in the skin of Ezequieto Neta, a teenager who has accidentally been to Black Man, Argentina, will have to overcome the bad smell of the laboratories of breath experiments, since it will have a bad smell that you can not imagine, the mod is in Spanish, then I'll put it in English.
Yep, this is Mickey Mouse, model replacement for HGrunt of HL, read more to read the installation
1) Download the addon.
2) Unzip the file (ZIP) mickeymouse.
3) Move the file hgrunt.mdl to C: \ Program Files (x86) \ Steam \ steamapps \ common \ Half-Life \ valve \ models. or where you have your Half-Life located, but if or if you will have to move it to the "Model" folder of your Half-life, for example: Half-Life, Valve, Models.