tl;dr - the hitch is that this will probably be shown on a windows machine.
with the above parameter in mind, a neighbor has had a death in the family and is trying to find someone to make a photo slideshow for the funeral in about 36 hours. i have done a quick search and will start working with shotwell as it is one of the methods mentioned in the link below. i am guessing that if i create a slideshow i may be able to convert it to a .wmv, but i just wanted to throw this question out to the community real quick like to see if anyone has a tried and trusted method.
as always, thanks in advance for any helpful responses