I know this has been done to death, but I am desperate for a laptop with a budget of 500 pounds.
Hopefully the laptop should have: Intel core duo processor Good for strategy games (nothing fancy games, just strategy games e.g. age of empires, football manager) A 15.4 or 17" screen that preferbally is half decent for watching films on. Wireless and just generally easy to complete work on using word, spreadsheets etc...
You can't build your own laptop. In theory you could but its impractical as you would have to buy all the bits for a particular laptop and the cost of the parts would be much more than buying a complete unit. And when I say much more I mean maybe twice the price, maybe even more. Its not an option.
The laptop you linked to looks ok and it has 2 gig of memory which is essential with Vista really but as to whether it would play the games you mention I just don't know. Laptops graphics don't tend to be much good with games and although the games you mention are not particularly demanding you have to bear in mind that once you buy the laptop the grahics you have is what you are stuck with. It cannot be upgraded.