Thank you all for your great comments.
mckennaronnie,
I used Microsoft Windows Movie Maker (it's a free program which comes with Windows XP).
Background music: I already had that mp3 in my computer (Pachelbel's Canon - techno remix).
I didn't use any Tutorials or website to guide me through because I didn't need it. The program is very simple. When you open it, you will see "movie tasks" on the left... If you already have pictures and audio (and video, which I didn't use) in your computer, you just need to import the ones you would like to use. After importing, you will see those pictures and audio in "collections". Then you will drag the clips and drop them on the timeline to begin making your movie. You may use some video effects and transitions... Actually this was my first video attempt, and I didn't use all the features of the program. After some trial and error, I learnt some features that I needed. It's really simple. I'm sure you'll figure out. Good luck.
SearchingTV,
Thanks for your suggestion. I'll do it soon.
... and, thank you antonis.