While trying to paste the AHK code quoted at the end of this post (used to execute scripts on special button combinations on my mouse - aren't gaming mice great productivity enhancers?) into a single grid item, I ran into some problems:
1. The dialog offering to paste as a single item does not open, instead the code is pasted as several items with different amounts of lines included in each item, i.e. IQ does not put each line into a separate item but groups them together by its own logic.
2. The items created are in reverse order, i.e. the top of the code / text ends up being the bottommost item rather than the topmost one.
3. I then selected all the items that were created and ran the 'delete items' command. Deleting multiple items at once seems to be a very slow and hard job for IQ even though it's not much more than a page of text in total (though that's probably an irrelevant factor).