llGiveInventoryList - give items into existing folder

I'd like llGiveInventoryList (or an equivalent) to be able to give items into an *existing* folder, rather than creating a new folder every time. Alternatively, provide a syntax to create categories inside another inventory folder (for example, "Neo's Stuff/Items 1" would create the category/folder "Items 1" inside "Neo's Stuff" (creating Neo's Stuff only if it doesn't already exist).

- Neo