1. Launch aimbot.exe from within your half-life/models/players directory, which should also contain the 2 .dll files which came with the original .zip. You should have downloaded the other .dll file and placed it in your windows/system directory, if it wasn't already there.
   
2. Depending on which models you're using, you <b>must</b> match the RGB value to the color of your player models. 
   
   If you're using 2 different colored models for CT/T, then you must know which one you will be when you join the server, or just use the same color for both models. For example, if you create all 8 player models with 255 blue, then you would set your colors to 0, 0, 255. If you don't have lambert working correctly yet, then you might want to dull that number down to about 0, 0, 240.
   
3. Set the resolution to what your current resolution is, use 640x480 and try it with D3D if OpenGL isn't working for you. If you must use Glide, I haven't tried it with that.
   
4. Leave the other settings as they are (X:100, Y:100; Refresh:50, Color Tolerance: 100).
   
5. There should be a check mark in "Draw Tracking Lock". If there isn't click it.
   
6. Read the perfect settings for additional info. If you have done all of this and not had positive results, please post what happened and everything you did. If I'm taking the time to read and write all this stuff, you could at least take time to do that. Don't just say, I did everything and it didn't work.

Disclaimer:
If you are pretty good at counter-strike, this aimbot won't help you much right now. The chances are better that it will hurt you more than help.