Management of documents, images, widgets  is all basically the same.  See Images to get you started.

Searching in the content of the documents is a whole different nut to crack.  I will have to defer the suggestions for that one to the other guys.  Quite honestly I'm not even sure that is possible.

You could always make your own "key words" field. A notes type area that you put in stuff when you add the resume like: woodworking, welding or whatever skills or key words you want to be able to look for. Then you could quickly look through the resumes later that match.

I'm with Scott on the content searching though. Although I have seen Windows bring up some search results based on the content inside, maybe it is possible to use Windows API to bring up the search and find them.

Depending on the file type you can use .NET APIs to extract the xml (the x in docx, xlsx etc) and read through that.

Yeah, you're beyond the capabilities of JUST Access at this point. If you want to search inside of the resumes, I'd recommend grabbing all of the text, copy and paste it into a long text field and store that as a memo in your database. Then, if you want to see the full formatted resume, store the path to it in your database. But... putting that up on Sharepoint is a whole different can of worms.