I have a 2005/2006 Mac Mini with a 1.5 Intel Core Solo processer. I can't view 720p or 1080p videos without them getting super choppy and slowing down my computer. If I have 1080p videos that I want to edit together, how would I do this? I have iMovie 09. My computer won't even play 720p videos correctly. (Also, I can't download Lion. I don't have the requirements.) Thanks.