HELP ME

I have a mac and i have it http://linerider.com/sites/linerider/files/smileys/wink.gif

i cant even get the option to download it! all i get is the same screen u saw a minute ago, where the download option should be!
i really am beginning to think that this game isn't coming out to the UK too, and i'm not paying £25 just to bring it into the country
in my opinion, this should be easy, stress-free, and fun. but all it is is stressful, un-fun, hard and annoying. it shouldn't be.
i need please before i go and get even more . at the moment this is just and i think my jaws going to... what?... oh no...
i have thought up of a plan!
what? oh it doesn't work...
if you want to see if it works for you, go here: http://www.microsoft.com/silverlight/resources/install.aspx
it's a good soloution if you can't see the dialog box. i have downloaded it too from here, but i think my problem lies in what the system requirements are. after all, my ing PC is XP not Vista...
also, my PC is... about 5 years old, and previously had 2000 ME, or 1999, i can't remember.
off to the other posts to see if they hold any better help. don't forget to go to the link above if you can't see the download box. other than that, sorry! im useless