I think about the easiest is animated gif many drawing programs can save in that format. I have PSP7 anniversary which has Animation Shop...it can take an AVI from Poser and convert to animated gif... There were several free programs for dfoing this as well...do a web search for gif animation program or something similar. or maybe AVI to gif converter.... Another method is Flash....Poser 5 and P4 Pro Pack can save in that format.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854