Regarding the batch encoding:

From the audiograbber help docs:

You can drop wav files from Windows Explorer into Audiograbber's main window to
easily normalize / create MP3's (assuming you already have the wav's.)

If you want to record many different cd's and encode them at a later time you
can use the option "Append ID3 info to wav file" under MP3 Settings in combination
with "Use sub directories only for MP3 and WMA" under General Settings. Then all your
ripped wav files will be stored in Audiograbbers base directory. The final filename/destination
and ID3 tag is taken directly from the wav file when it is later encoded.