I downloaded http://dl.qj.net/PiMPStreamer-v0.81-installer-PSP-Homebrew-Applications/pg/12/fid/13174/catid/189 and When I try to open it, it opens MSWord, how do I change this?
you can which program a type of file open in via Control Panel --> Folder Options --> File Types --> (file extension)
Or you can right click, and say open with, then click on the radio button saying "chose program from list", then chose the program you want (click browse) and then tick the box saying "always use the selected program..."
I reccomend downloading the latest Windows Installer and it will fix the open thing automatically when you install it. click here for Windows Installer from Mircosoft (Validation Required)