you will have to phone home and get someone to read the installation key for you.
Apple will almost certainly not help you.
I know there is not an Apple store in South Georgia, or there wasn't the last time I was there, so a call home is about the best you can do.
I installed my purchased and paid for at the Apple Store iWorks, but guess I did not fill in the space asking for the Key Number. The error message says it is on the disc envelope or box, I am not sure which. Now I am on a ship for the next 35 days with stops only in very remote islands. I wanted to use my new iWorks. Wrote email to email@example.com, but received automated reply saying go to support on Web site of Apple. I only have Satellite Internet connection and am using newest OS on Apple MacBook purchased only a week ago. Also, I purchased Parralells softward to run Windows, but forgot to bring my Windows XP OS software, so that won't work either. This is a last ditch effort now, so if you have ideas let me read them. I am going to be back on Internet in about 24 hours. Now in Antarctica, near South Georgia Island. Thank you, Don