Windows 7 gta4

i have the game gta4 and when i play on line with friends they have mods and so on and a friend emailed me mods loader and the whole nine but when ever i try to open the file i get windows media player how can i open without media player and just look at the file and extract it to another(gta4) .:confused:

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.