Use one button to Melee like in Halo

[odkKoma]

Thanks, Kill4Food, but it's still not working!

When I load a map nothing works, except for the "PipeA" command. Can't move the mouse, can't press fire, ...

I'm using x-Mouse Button Control to assign my mouse buttons so I replaced "ThumbMouseButton" with to what it is assigned for me, in this case "PageDown". I also tried replacing it with "C" but there was no difference. After hitting STRG+ALT+DEL I noticed that the command slipped back under [UTGame.UTPlayerInput] again (additionally).

[Kill4Food]

That's odd. It may have to do with x-mouse then. I use my default mouse settings with my Logitech Cordless Mouseman Optical.
All I can suggest now is you revert your mouse bindings in x-Mouse to default settings. I haven't heard of anyone else having this sort of problem or how to solve it.
Also, I think when you bind something it shows up in [UTGame.UTPlayerInput] anyway so you shouldn't worry about that.

[DeathmooN]

Why don't you just bind your weapons to different keys and not have to worry about switching back to the wrong weapon?

[Kill4Food]

The purpose is....
To switch with one button to the impact hammer to attack by holding down that same button and then when done attacking you autoswitch to a good gun. Its good when your in close quarters and makes the gameplay a bit simpler. I've used it in some tight spots its works well. All I can say is try it an see how it is for you.