Jan,
The software I used for my MAC computer is called "Comic Life".   You can
purchase it on line from "Free Verse" at http://plasq.com/comiclife-win
It costs around 30 dollars.
For a PC computer you can use "Comic Life" for windows or a program called
"Comic Book Creator" http://www.mycomicbookcreator.com/
Both are very easy to use.  When I did my project, neither programs
existed. The comic programs were introduced this year, so it's great for
people interested in facilitating photonovel projects.
Laura

Laura Nimmon
MA Language and Literacy Education
www.photonovel.ca