NONONONOOOOO!!!!!! Please don't sully what has so far been a wonderful fantasy with a specter of disappointment. In the world that leads to Lunar vacations, the series of debacles and compromises that led to the ISS would never have happened.

If you must have it, just say the ISS is a museum piece (in an orbital museum, natch). Kids can crawl through some of the tunnels and such. Call the new station Skylab IX or something.

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"If this were play'd upon a stage now, I could condemn it as an improbable fiction."
Shakespeare, Twelfth Night
Illuminati's Razor-The most complicatedly evil answer is usually the most correct answer. - Fazor
"Every book is a children's book if the kid can read." - Mitch Hedberg
"Distance doesn’t matter much in space, where if you just start a thing off with the right kind of shove, sooner or later it will get where you want it to go." -Frederik Pohl, Mining the Oort