Nope, it doesn't auto install anything :)
All it is is a lean mean installer for BSPlayer! ...and when you uninstall it, it unregisters BSPlayer and restores your previous File Type settings (extentions) in the registry.
All this is done through BSPlayer:
1. Firstly, it writes 2 entries to the registry which tells it to associate extentions (.avi/.mpg) and to register them on player startup:
- WriteRegStr HKCU "Software\BST\bsplayer" "exts" ".AVI;.MPG"
- WriteRegDWORD HKCU "Software\BST\bsplayer" "RegE" "1"
Then after installation is finished it autostarts the player which registers the file extentions.
2. When uninstalled it first checks to see if BSPlayer is running, if it is, it closes it. Then it executes it with the -UNIS parameter:
- ExecWait '"$INSTDIR\bplay.exe" -UNIS'
which restores the file associations back to what they were.