Multiple installs of the same application? Is there any way to have multiple installs of the same application (in the same user account)?

Basically, I have several google reader accounts, and I want to be able to have multiple instances of Reeder. As it is, changing accounts at the moment involves restarting the app, and manually typing the different account info in. At that point, you have access to only one of the accounts, and switching involves the whole rigamarole again.

Is there any way I can have something like a sandbox for each instance, with it's own keychain?



I have Xcode installed, and I would imagine there is some mechanism in Xcode for letting programs have separate keychain/info, for when you are testing an app you have compiled. Is there something like this and/or how do you use it?
You can do this with Reeder. 


You will need as many user accounts as you have Google accounts. 
Supposing you have 2 Google accounts, you can obviously run your main Google account as the default user. Just click on Reeder from Launcher or Dock and you are good to go. 
Go to System Preferences, Users &amp; Groups, and create a new user. Call it TestUser. Make sure you set a password. A standard user account would do.
Open Terminal. 
execute this: echo "password" | sudo -S -u TestUser /Applications/Reeder.app/Contents/MacOS/Reeder &amp; 


voila! You can now see a 2nd Reeder window!