For anyone that wants to use this or any other lua script or pretty much any console command on ANY server then do this: (some servers which check for lua scripts or check that sv_cheats/sv_allowcslua is set to 0 might ban/kick you for this)

1. In the main menu, open up the console and type each of these (one at a time):

bind , "incrementvar sv_allowcslua 1 1 1"

bind . "incrementvar sv_cheats 1 1 1"

bind / "lua_openscript_cl autorun/client/lennys.lua"

2. Close console and press , then . and finally /

3. Start single player and do the same as step 2. Lenny's Script should open and both sv_allowcslua and sv_cheats should be set to something like 1.0000000.

4. Press escape and find a multiplayer server. Join and do the same as step 2 each time you join a new server or start a new map. If done correctly Lenny's Script should open and both sv_allowcslua and sv_cheats should be set to something like 1.0000000 like in step 3.

SPEEEEEED: Open console in a server and type incrementvar host_timescale 2 2 2 (or 3 3 3) to double or triple your speed. Change the numbers to 1 1 1 to return it back to normal.

If you find any changes or any other commands which can be used then tell me and I will add them. I have tested this multiple times with a few other people and it worked fine so if it does not work for you then it has probably either been patched or you did it wrong.