Here's an example:
Suppose you want to find all files in your "Downloads" folder that are created within the last week, of kind either "text" or "PDF."
So first make your saved search, specifying "Kind: PDF", "Created: This week". Save it, say with the name "Recent Text or PDF"
1. Go to ~/Library/Saved Searches/
2. Drag your "Recent Text or PDF.savedSearch" file onto the text editor of your choice.
3. On lines 7-8 (or so), you'll find
Code:
<key>RawQuery</key>
<string>(kMDItemContentTypeTree = 'com.adobe.pdf') && (kMDItemFSCreationDate >= $time.today(-7)) && (kMDItemContentType != com.apple.mail.emlx) && (kMDItemContentType != public.vcard)</string>
4. Now we'll edit that query to include text as well as PDFs:
Code:
<key>RawQuery</key>
<string>(kMDItemContentTypeTree = 'com.adobe.pdf' || kMDItemContentTypeTree = 'public.text') && (kMDItemFSCreationDate >= $time.today(-7)) && (kMDItemContentType != com.apple.mail.emlx) && (kMDItemContentType != public.vcard)</string>
5. Save the file.
6. No step six!
Actually, you might have to make a copy of the file, or rename or move it, to get the Finder to refresh its cache.
I'll accept an iTunes certificate, thanks. (J/K)