how to load passenger from apache with rvm and unique gem sets

So i kept getting errors that said ruby couldn't find a specific gem. Looking at the stack trace it shows the version of ruby you are using and the gemset. Of course you can create a custom gemset for each app you are working on, but the problem is that passenger doesn't read your custom gemset without extra configuration. So here is where I found the fix (read first answer):
http://stackoverflow.com/questions/5680341/how-to-load-passenger-from-apache-with-rvm-and-unique-gem-sets