Karuro, if you have nothing nice to say on the current topic of FIXING something, then don't say it and begone, at least I'm putting my differences aside to HELP someone.
Anyways, ikari911, there's a difference between Boot Camp and that "thing" you saw in the store. What you saw in the store is called a Virtual Machine which allows you run a Guest OS under the Host OS (in other words, whatever the current OS you're running will be the host (like at a dinner party) for another OS (the guest of the party that you're hosting)) and those normally involved having more system specs to run. What Boot Camp does is to allow you to install a Windows OS and be completely bootable without having the need to be under your Mac OS. In other words, Dual Booting (something that's been done for a long time since the dawn of Windows OS and Linux).
Anyhow, if I would have to guess, I would think the CD labeled "All Things Mac" would be it but I'm not sure, normally they will come with the original Mac OS Installation CD but nowadays they've been coming out with more and more "Images like" CDs so you might want to check with either Apple or talk with the rep who helped you with your puchased at Best Buy.
If you're still having issues finding it, I guess you could try one of these downloads from Apple (they're boot camp installation thingys from what I can tell)
Boot Camp Update 2.1 for Windows Vista 32
Boot Camp Update 2.1 for Windows Vista 64
Make sure you download the correct version for the version of windows you're running (if you're running a 32-bit windows (aka x86), download the first link, if you've installed the 64-bit version of windows (aka x64), download the second link).