Have some trouble. (change default player)

[Antebellum8]

So I installed Nero today, which included Neromix. When i started to play my video files, it played on the Neromix player, and not Windows Media or Quicktime, and I do not want it to play on Neromix.
Now I have unistalled Neromix, Nero all together, and I have also installed limewire a couple of times, and now my files will not play on anything. Is there anyway I can change the standard player for my video files, or make it so that my avi, mpeg, mpg ect. files play on Windows media, and my mp4s play on Quicktime?

[birdy]

Open WMP, click on the little arrow next to 'minimise'. From the dropdown menu click tools > options. click the File Types tab. Tick all of the file types that you want WMP to open > apply > ok.

If that doesn't work, open LW's saved folder by highlighting a file & clicking Explore. Once you're inside the saved folder, right click on a file > open with > choose program. Choose the player that you want to use from the list & tick the box to always use the selected program to open files of this type > ok.
Same thing for your mp4s...choose QuickTime from the list of players