Yes, with knobs on. What exactly is it you want to do?
. If you want to automatically fill individual track fields (eg pick up the track numbers and titles from the filenames), just right-click anywhere in the blank area below the "Comment" field and select "Automatically fill values". You can also add any custom string such as "Remix" this way.

Yes, just extract the .dll into your %Program Files%\foobar2000\components subfolder (the same goes for any other foobar2000 plugin).
You can then just right-click all the files in an album and tag them from whatever online database you're using, although with freedb they might still need a bit of manual attention depending on the accuracy of the tags.
