Just a note, in case you are installing Fusebox 3 apps on a CFMX 7 server, you may need to edit the index.cfm file to change the variables.fuseboxVersion which is set to check if it is less than 700, to less than 800. This has been addressed in the Fusebox 3 core files by basically checking to see if it's version 4.0 (lt 450) or 4.5 (lt 500) and if not it forces the use of the latest core files for FB3 which would be fbx_fusebox30_cf50.cfm. (fbx_fusebox30_cf50_nix.cfm if using a Linux based system)
I found this out when I was trying to get the Wireframe Viewer/Editor ver. 3.9992 beta installed and all I would get was a blank screen when I brought up the index.cfm file.
Oh and while I'm speaking of it, the Wireframe Viewer/Editor can be found here and pretty much rocks my world. It can be used while sitting with a client to wireframe a site and gives the client the actual "click through" that some like to see. It will also help in a big way as you'll be able to layout the entire site with pages that should be included and the entry and exit points for each page - allowing you to give a certain level of sign off on what the client really wants right from the start!