At work I have to use multiple packages to create effects and graphics - a couple of the packages I use, mainly Proanimator for 3d treatments on logos, has some quirks in how it exports - so I have to export it as a series of TGA files.
When I import these into my Avid, there's a feature which will assemble sequentially named graphic files into moving video automatically.
This feature is pretty universal across their software - I've used it on my home setup running Avid Xpress, as well as work where I use a much higher end system.
I think Avid Free DV can do this as well, although last time I saw it you could only export to a video file, which is no big deal as you can export it to lossless quicktime with quicktime pro.
On an XPress system you could cut it to the tape system of your choice.
