skinme yes you can include() or require() a file with other includes in it just remember that all apths are relative to the calling file and not the included ones.
zoobie a host that has include() and require() disabled may as well not bother offering PHP hosting at all ! seriously, find another host.
MVC is the current buzz in web application architectures. It comes from event-driven desktop application design and doesn't fit into web application design very well. But luckily nobody really knows what MVC means, so we can call our presentation layer separation mechanism MVC and move on. (Rasmus Lerdorf)