Thanks for replying guys. The reason I wasn't able to say thanks sooner is because I was trying to confirm with my domain provider whether or not the wildcard was available. I had a suspicion my problem didn't lie with what I was doing (in the direction both of you were pointing at) but rather with the domain itself. Sure enough, I contacted the domain provider and was told, indeed, subdomain wildcards cannot be used on their service, only www. and no subdomain are allowed (domainname.com) and I don't have the access to change it, nor will they give that information to me.

So off to the races in finding a domain provider that does allow it and gives me the opportunity to change the information around when I require.
Thanks again.