How to create a spotlight search for all files inside a folder? In Lion, you have All My Files to search everything in your home folder. However, when you activate finder's spotlight, via command + F you can start searching only by first typing something.

How can I search for everything in one particular folder (say, external HDD) without specifying a search token?
After some more research, it reminds me that finder's spotlight had boolean UI since OS X 10.5. You can filter for "not a folder"  for All My Files experience, or with a little bit more filter  for "all files".

It feels a bit hack-y though.