Open controls.lst (located in the sys/ folder) using notepad then copy and paste this:
Quote
"blank" "Buy Binds"
"m4a1; ak47; hegren; flash; flash; vesthelm; slot3" "Buy Weapons"
"buyammo1; buyammo2; hegren; flash; flash; vesthelm; slot3" "Stock"
"deagle; nvgs; defuser; sgren; slot3" "Misc. Stuff"
Save the file.
In CS2D go to options->controls and scroll to the bottom.
There you can asign the key you want to the binds.