I once had a 3D animation plugin for Vegas Pro that worked great for creating a cube or box with video planes/sides but it was expensive for the once a year I might use it. So, I worked on some ideas and came up with this for aligning and attaching video planes using iClone 7. It works pretty slick and can be done it about 5 minutes - if you have the video's prepared already.

Part of the trick is to initially align the base video to a zero axis, create duplicates that are stacked on that, rotate and move them in place, and then attach everything to a base video. I created duplicates at 1st because afterwards I could quickly load new video textures over them. Another thing to remember is to right click, hold, and drag the video's onto the screen. I saw a tutorial on adding images by dragging, but totally missed the part about right click/hold.