I'd have to say the Windows Movie Maker is one of the best bits of "free stuff" microsoft have given away. I'm no expert, but find it fairly intuitive. There is probably much better / fancier stuff out there - but it does what most people (including you on this occasion) need. They are bound to bugger it up in future versions!
Thanks guys - Movie maker took 30 secs to down load and as you say Polwart is intuitive to use ( and free ! ) and seems able to cope with any format - I have put 1st attempts at use with the other pics in the racing section .