Eh, no need to 'dude' me, mate, especially not in bold-type... I can read perfectly well, thank you, and my name can be found right above the post... Also, state more clear in your OP what it is exactly you want to get done. We can't read minds here, or at least, I can't.


Nevertheless

vi /etc/apt/sources.list.d/hildon-application-manager.list

If you have trouble editing this or working with vi, I'd advise you to download Midnight Commander, fire it up and start editing it from there. Some people find vi impossible to work with.