Good effort that man

As Steve said, photoshop of some description is the best way to go. But you can pick up Adobe Elements 8 for under £100.00, which does 90% of what Photoshop does, thats a great investment.

Looking at the pics, did you take them in Programme setting (automatic)? It looks like you have, as it has exposed the majority of all of the pictures well.

The ONLY criticism I have (and I hope you take this as constructive mate) is that a few of the pics would have benefitted from having a portrait orientation instead of landscape. So that you could have more of the subject and less of the background.