Tweaking your config.cfg with the commands mentioned above is 100% safe and will not result in a VAC (Valve Anti-Cheat) ban.
m_rawinput 1 : Bypasses Windows acceleration for 1:1 movement.
cl_dynamiccrosshair 0 : Keeps the crosshair static, making it easier to track the center of your screen during sprays. Cs 1.6 Aimbot Cfg
ex_interp 0.01 or 0 : This is the "magic" setting. It minimizes the delay between where a player model appears and where their hitbox actually is.
fps_max 101 : The golden standard for CS 1.6 to ensure physics and recoil behave predictably. How to Install a New CFG Tweaking your config
In CS 1.6, a is a text document (usually config.cfg or userconfig.cfg ) containing a series of console commands.
rate 25000 : Ensures maximum data transfer between you and the server. ex_interp 0
cl_cmdrate 101 and cl_updaterate 101 : Matches the engine's maximum tick rate for smoother player movement.