Hi Ranger505
Welcome to the forum!
I second Cornett in the fact that the membership is definitely worth it
Subscribing to the ISIS adventure will allow you access to the pyramid map. Once you have opened your ISIS, you will be able to use yor key to open one of the virtual or real pyramids placed around the US and Europe. You will also be able to take part in the hunt for free ISIS/Ramisis puzzles, although you may have to travel quite a distance. SW also have a mystery picture game, where the first person to work out what the picture represents will win an Nkryptor puzzle.
If you do decided to subscribe, there is also a chance that you could win one of the free membership's that SW are offering - see the forum board index for more info
The decryption files are only really useful if you have trouble decyphering the clues in the booklet.
Best of luck with your ISIS
Karen
Opened: ISIS 1, ISIS 1A, Eagle ISIS, NK, NK Tut, Kuku
Key out: Ramisi5
Unopened: ISIS 1B, ISIS 1C, Ramisis