Glad it works for you, but not best practice. You now have to maintain 7 installs. By using one install and appropriate shortcuts you only have to maintain one install - the shortcuts won't need to be changed anyway.
What you are demonstrating is a level of trust in your other users. You have allowed them free access to the C:Programs folders. In your circumstances that may be acceptable but I certainly don't recommend it as a default stance. And I don't think those who help others should either, as it breaks the "rules" on least priviliges (which helps with security and prevention of malware).