I want to make a music video...Software Suggestions?

[-black]

I'm getting married (lol) summer 09...and I want to make a music video of wifey to show at the reception. I'm thinking of using the song Yellow by Coldplay and using clips of her (our engagement, her at the hospital with my daughter, me and her at the beach) that I have recorded over the years. If I did use that song I would want to have effects to make the video actually look good (maybe some yellow effects, and some other neat/cool things).

Windows Movie Maker came on my PC and I use it for youtube videos but it doesn't really have alot of options for editing, special effects, and such. I heard I can download add-ons for Movie Maker but are they free and how good are the add ons?

should I use Windows Movie Maker or go and buy different software? I want to work on this for the next 5-6 months cuz I really want it to look somewhat professional. I also want to do it myself, so im not looking to pay anyone to do it for me. Anyway, are there any good free editing programs out there? Should I just use Movie Maker w/ add ons? What are the best programs out there that I could buy? Any suggestions on how to properly make a music video?

Also, has anyone ever did something like this at a wedding? How much does a large screen cost? How much would it cost to rent a projector for a day?

I'd appreciate any replies......