pack data has inverted all my settings

i made a house walkthrough and was told to pack the data in order to have the textures visible, but now when i start my exe file everything is inverted. my scene is upside down, my left is right and forward is backwards, any help on this please

:o Umm… that shouldn’t be happening if you had no problem in the .blend. Umm, can you post the .blend and we can take a look?

Jason Lin