X-Ray without minecraft files modifications

I am looking for a x-ray hack that does not alter minecraft files because if I change files, the launcher dowload new cleans files.
I can't also using my own texturepack only the texturepack from the server are allowed.

someone has a solution for me ?

Either create a xray haack or use a texture pack

I'm not really a Programmer and it is impossible to edit the file. otherwise it is updated automatically and then clean version launched and texture packs can not be used on this server