Originally posted by: DragonMasterAlex
The easiest thing to do to make something appear widescreen (I had to do this recently) isn't in premiere at all. Instead, load the program in VirtualDub (
www.virtualdub.org), go to Video-->filters-->resize. Set your video size to the size of your video (probably 480x320 depending on your source, make sure this number is *exactly* the same pixel size as your source material or look forward to artifacting hell) and then set the second property, pixel size (the one underneath) to 720x480.
When you render it all back out to a new AVI (be sure to set compression to something that will fit on yoru drive. DivX works nice) it will appear to be letterboxed
Jason