Speaking of which, just in case there are others of you out there who have 64-bit systems, and have always downloaded the LV installation packages from the web...
The DVDs that NI sends out do *not* have the 64-bit IDE. If you use the DVDs, you will get a 32-bit install, even on a 64-bit system. With no apparent warnings -- other than the fact it asks if you want to install into "Program Files (x86)". Yes, I just learned this one the hard way.
Go here to kudo an idea to add the 64-bit IDE to the Platform DVDs.