1.) search the board, there's so much patchers you can use, Thor, NeonCube, JikariCube, TriadPatcher, and others. NeonCube and Jikari are easy (but i guess no longer supported / developed). Jikari is a diversion from Neon. Thor is useful for people who want to do a lot of changes in the client files.
2.) lite installer? simplest way: put all of the files into 1 folder, then rar, and distribute. including your patcher there.