Hosts file updater script?

[Taehl]

I've recently decided to stop using Spybot S&D, seeing as how I was only using it for its hosts "immunization" feature. But I'd like to continue using that kind of protection. A simple web search will turn up a number of convenient pre-made lists, all you have to do is copy them into your hosts file. But wouldn't it be much nicer if my system automatically updated my file from the list each month?

So, the task is this:
1) Download [url=http://www.mvps.org/winhelp2002/hosts.txt]this file[/url]
2) Replace all instances of "127.0.0.1" with "0.0.0.0"
3) Replace the line "0.0.0.0 localhost" with "127.0.0.1 localhost"
4) Dump this into %SystemRoot%\system32\drivers\etc\hosts

My questions would be:
1) What scripting languages would be up to the task?
2) Which one would you recommend?
3) Is there anything I should be aware of if I use that language (including, but not limited to, insecurities, third-party addons required for implementation, and so forth)?