iPhone app 'fake' landscape mode

So after wasting many hours trying to get my app to run in landscape mode by defualt I'm looking for an alternative.

My idea is to create the app in portrait mode but rotate everything by 90 degrees, the player thinks that he is playing the game in landscape mode (when really I've just rotated everything). I recognise it will be a little awkward to develop but I come into all sorts of issues when I try to program for landscape.

My question is, does Apple frown upon this? Could they reject my app for any reason or is this safe to do? Are there any issues I should be aware of?

Advice/articles/help all appreciated.