Vista - Making a game Vista Compatable

I've been working with a set of games to find a way to make them compatable
with vista. The way the games are set up you double click on the desktop icon
which is a lnk file. This opens a file inside the main directory called
olclauncher. Once open there's a set of 5 seperate icons on the launcher.
Each one is blacked out unless there's a registry key entry in the
hkey_localmachine-software folder. On XP and any os before when you click on
one of the colored icons it starts up the game that corrispondes with it. All
5 games are located in the same directory folder in program files. If you
click on the multiplayer game it opens a pre-launcher then goes to login for
the online. On Vista it won't trigger the next exe. When you click on the
icons the launcher closes and that's it. If you run the pre-launcher
seperatly it'll open the launcher up, but will not go the other way from
launcher to pre-launcher. Any suggestions or help would be greatly
apprechated.