The big question of today was. What component do I choose?

amd_64, wow_64 or x86_64…

amd_64 is used on x64 installs.
x86 is used on x86 installs.
wow_64 is used on x64 installs for 32bit components installed on x64.

Here’s a quote from Microsoft Technet:

The answer file must include processor-specific components. The answer file settings in the windowsPE configuration pass must match the architecture type of the preinstallation environment and the settings that apply to the Windows image must match the architecture type of the image. For example, if you are creating an answer file that deploys 64-bit images from a 32-bit preinstallation environment, all components in the answer file for the windowsPE configuration pass must include the processor type attribute of x86. Settings to be applied in the specialize, oobeSystem, or other configuration passes must include the processor attribute type of amd64.

http://technet.microsoft.com/en-us/library/dd744395(WS.10).aspx