My suggestion:
1) put a copy of sweep.exe and mp3gain.exe in your path. For instance in the relevant ..\WINDOWS\.. folder
2) Make a subdirectory for your artists or move your "independent" mp3's somewhere else
Assuming the filestructure now is something like this
\Musik\
|
|---\Artists\
| | --------\Bowie\
| |---------\Rolling Stones\
|
|
Independent mp3's.
You can put a BAT-file in your ..\Artists\-dir with the following:
@echo off
[drive]:
cd "[drive]:\...\Artists\"
sweep.exe tag.exe --remove --force id3v1 --force ape2 *.mp3
(For converting to APE2 plus ID3v1 and removing other tags)
sweep.exe tag.exe --rentag --scheme "N - T" *.mp3
(For renaming, but somehow I can't get it to work. Case, help?

)
sweep.exe mp3gain.exe /a /c /t *.mp3
(For albumgaining without clipping warning and while using a temp-file)