I've some questions regarding editing my music video.

1) First, is it easy to do split screen in Adobe Premiere Pro CS3? Can anyone give me a link to the tutorial? And, what things should I keep in my mind while doing it?

2) My next question is regarding giving the video a home made and old feel. If you guys have seen 500 Days of Summer, then you'll know what I'm talking about. The opening credit sequence. I searched for it on youtube, but didn't find it.

What are the effects required to do it?

3) There is a birthday party scene in the video, and I'm thinking of showing it with pictures. I don't know how to put it here, but something like showing action with pictures with a slow frame rate. I hope you're getting this. If you don't, here is a music video that I found..

I want something like this. What is it called? Also, how should I shoot the birthday party to make it natural?