Can I install Windows 7 with boot camp, but install all my PC games for it on an external hardrive?

Question

I have a new Mac, but I want to install Windows 7 with boot camp on it. However, I would only really be using it for gaming.
On another post, someone said that you could not install boot camp entirely onto an external hardrive. As boot camp would only be for gaming, then could I install all my games (when I'm given the option to chose the file of where to install) onto an external drive which is correctly formatted? (what is the format too?) Also, which would allow for a faster gameplay, USB 3.0 or Thunderbolt? as fast gameplay is important
Thank you

Answer 1

How to move steam to another drive: 
Delete everything in the Steam folder except for the "steam.exe" and the "steamapps" folder
Move the steam folder over to the secondary drive you want it on
Open the "steam.exe" and it will reconfigure steam
Log in and BAM! All your games are recognized
Now, you can put what ever games you want on the SSD with Steam Mover (or junctions)
Create another folder on the C:\ drive and name it (C:\Users\Sean\Steam Games)
Run Steam Mover and have it move the game to that location and you are done!
Now go play the games you want!
How to have steam on the SSD while having the games on either the SSD or HDD: 
Delete everything in the Steam folder except for the "steam.exe" and the "steamapps" folder
Have the "steam.exe" to a folder made on the C:\ drive (C:\Users\Sean\Steam)
Have the "steamapps" folder on the HDD you want to store your games (D:\User\Program Files\Steam\steamapps)
Make a junction from the "steamapps" folder to the SSD folder with the "steam.exe" in it
Open the "steam.exe" and it will reconfigure steam
Logged in and BAM! All your games are recognized and steam is on the SSD and the games on the other drive.
Now, you can put what ever games you want on the SSD with Steam Mover (or junctions)
Create another folder on the C:\ drive and name it (C:\Users\Sean\Steam Games)
Run Steam Mover and have it move the game to that location and you are done!
Now go play the games you want!