How do I host a Sharepoint 3.0 intranet on our company webspace?

We have just installed a new server with Small Business Server 2008 and Sharepoint 3.0 and designed an intranet site for our office and also for remote workers.

External Users can log in to the homepage externally through the IP address and port number but there are some parts of the site that point directly to our server and remote users cannot get access.

Is it possible to host this page remotely on our webspace so that all users will use for example www.oursite.co.uk/intranet and they will have the same access to the site inside or outside the network?

I hope I’ve described the problem ok and any help would be much appreciated, thanks.