Screen Recorings in the Classroom

In teaching the freshmen course Geography & History of the World, I always assign a PowerPoint project to end the semester. The project concerns a country from South, East, or Southeast Asia and there are many guidelines and requirements for the students. The assignment is basically researching, creating, and then presenting their PowerPoint over their country.
I always run into a few problems during this assignment. Since my computer at school (they use this to present on) only has Microsoft 2003, students with newer versions of PowerPoint often have trouble trying to save on my computer when they bring in their flash drives. My computer did not convert the files automatically. Also, students without flash drives often struggled to find a way to bring in their PowerPoint. Finally, some students struggled to access information from a certain website given to them.
I would teach/explain all of the above in class before the class uses the computer labs. However, with Screen Recordings, I could make three separate 'How To' recordings covering how to save a 2007 PowerPoint as an earlier version, how to attach a file (their PowerPoint) to an email to themselves and/or their partner, and how to use the CIA website given to them in class. Another great Screen Recording would be how to merge two PowerPoints into one. This often comes up as a problem. I would make all of these recordings accessible via the class wiki or on the class blog site. Students could view these to review and remind themselves of how to complete certain tasks, and this would save a lot of class time used in the labs on questions.