You must make shure that the Console is enabled. Under the shortcut on your desktop add the following to it -console. To edit the shotcut right-click on the shortcut and select "Properties". See the picture below for help.

How to install the Half-Life Binds/Scripts
Unzip/Unpack the files in to the Half-Life\valve folder (eg. D:\SIERRA\Half-Life\valve).
If you've installed the Binds/Scripts correctly the console should look like the picture below.

How to uninstall the Half-Life Binds/Scripts
To uninstall the Half-Life Scripts delete the files actions.cfg, autoexec.cfg and sound.cfg from the Half-Life\valve folder. Then copy the file kb_act.lst from the folder "orignal kb_act" back into the Half-Life\valve\gfx\shell folder.
Setting up the controls
Open Half-Life as normal and go to the controls menu and go down to the bottom and all the new control binds will be there!
I suggest you turn Num Lock ON and use the Numpad arrow keys for extra buttons.
Suggested Key Binds
Crouch Jump - Q
Netgraph ON / OFF - F3
Show FPS ON / OFF - F4
3rd / 1st Person View - HP_5
Cheats ON / OFF - HP_INS
All Weapons - HP_END
Godmode ON / OFF - HP_DOWNARROW
Ghost Mode ON / OFF - HP_PGDN
Gravity 25% / 50% / 100% - HP_LEFTARROW
How to change the Name Swap bind
Right click on the actions.cfg and open it with NOTEPAD. Go down to the bottom and just change the names [TKC]BrooniE and [TKC]FAT DiNO. To have a space in your name just put a % sign.
NOTE: Sometimes the game will crash if you put a % sign into a name.
How to do the Bunnyhop
To do a Bunnyhop either jump forward and while in mid-air press and hold backward OR jump backwards and while in mid-air press and hold forward.
Changing the console colour
To change the console colour you edit the shortcut on your desktop. To do this right-click on the short-cut and click on Properties. In the Target box add +con_color "xxx xxx xxx" to the end of the line, it should look something like the one below. The xxx xxx xxx could be any colour you want.
D:\SIERRA\Half-Life\hl.exe -console -game cstrike +con_color "xxx xxx xxx"
Here is a list of some good console colours:
Green - 000 255 000
Red - 255 000 000
Purple - 235 000 235
Blue (Teal) - 000 200 200
Standard - 255 155 050
White - 255 255 255
Dark Blue - 000 000 255