I know that my brother uses Pinnacle Studio Version 7 to edit his digital films. He says it works a treat, though it does need a reasonable PC (500mhz and up or 128mb). Its easy to use and can save the files in any format.
Alternativly, www. scan. co. uk have a todays special offer on some software which looks quite cheap and easy. It was listed under teh DVD drives they had on offer. Take a look as it could be just what you are after.
Hope this helps.