Did you open it in notepad by rightclicking on it? My guess is, you've accidentally ticked the 'open this with notepad all the time' box thingy in the lower left corner of the window.

It doesn't matter that it has the notepad pictogram, it doesn't change anything in the file. If you really want to get rid of it, open Windows Explorer, Edit->Options, tab Filetypes.. look for .bsp and remove the reference. (Doing this from the top of my head, as I'm on my laptop, which runs KDE).

crap i cant find it now i just did minutes ago changed it to a fricking windows movie file god kill me now anyways can u explain it correct?

well for a second later i just changed it back to note pad but i cant not find how to put it back to its original place

Windows Explorer
Tools->Folder option
Tab 'File Types'
Scroll down the filetype list until you find .bsp.
Delete the line and everything should be as it should be.

its ok now i can play it so i dont have to do what u said






ps. thanks welshy for helping me of how to play this map