Pardon my english! :)

If I understand you correctly, you can also use the "untrim" procedure to remove your hole. To do that, select unattached edges that make up a hole and use Delete.

Some more explanation here: http://moi3d.com/forum/index.php?webtag=MOI&msg=444.4

Also a longer tutorial on how to do different kinds of repairs and restore objects by using untrimming: http://moi3d.com/forum/index.php?webtag=MOI&msg=446.17

- Michael