texture the inside of a model

[gobblegob]

Hello I have just started using Wings (today) and find it quite easy to get around thanks to the youtube channel.
I am facing a problem and I cannot find anything on these forums or google.

I am trying to create a cave, where only the inside is textured, but it seems you can only texture the outside of an object. I have found a workaround by creating a tube and selecting all the outside faces and selecting "hole" to remove them but I dont like this as I wish to start with other shapes.

So my question again is "Can I texture the inside of an object and not the outside?"

Sorry if my terminology of a bit off but like I said first time using wings (or 3d modeling)

any help would be awesome and appreciated, maybe I am not searching the right key works because im not clued up on the lingo.

Thanks in advanced

Warren.