first of all, YEE-HAH fast reply works. ok now for the serious stuff.
in the World Editor click on the AI Editor tab (it's the green icon, or you could press F8) then click File->Open AI Data... (or you could use Ctrl+O, you must be in the AI editor). if you can't get it from that i shall be forced to get screenshots.
EDIT: i just thought of something, if you already have done that, you may have to do something different. try File->Add to map... then you can put it where-ever you want.
PS, i got confused cos what you said was vague, please use more words in future, it will save time/posts/brain power in the end. thanks.