[quote=Kierra](in edit mode with all of the verticies selected, hit spacebar>Edit>Normals>Flip) [/quote]
Really there's nothing more to it. In the 3d view make sure you use the 'Textured' drawtype, you should be able to see whether the texture shows on the outside or on the inside of your model.
Alternatively you can try >Edit>Normals>Recalculate Inside ..