loadMovie ref path vs. individual movie ref path?

I name a load Movie like this?

host.loadMovie(“main.swf”);

Right now when I load the movie into another I have to call a movie clip named “block” like this:

_root.host.block

But if I run main.swf by itself the “block” she be referenced _root.block, so it can’t find it.

How do I name/instance it so it works either as a seperate movie or loadmovie?

RR