goral: What does it matter? He should get the key for the original anyway, he's paying the same amount as people who don't own the original. If anything, he should get a discount since he already has the game and P:T EE is worse than original with mods.
I love it when people make assumptions with no real basis in reality. Why should the op get a key for the original if they aren't buying the original game? You don't get a free copy unless you didn't own it before. The owners of the rights for the original game pulled it in favor of the EE. Also, assuming the EE is worse than the original is a stretch as well. When the EE was announced, many people (without playing it, because it was as yet unreleased) started complaining that is was an inferior version with zero evidence to back it up. I have both, and I use the WEDU mods for the IE games, and my personal experience is that the EE are as good. Your opinion in this matter is unnecessary. You are not entitled to something you did not purchase.
This game does not offer the original in the form of a serial key like BG did. And people who own the original got a 30% discount for almost 2 weeks to buy the EE. I doubt you own or have played PT EE.