Reorganised slightly, and added my spc sample ripper + spc2it.

neotools/autoextract.bat

@@ -0,0 +1,19 @@
+if ["%~x1"]==[".vgz"] goto vgztopcm else goto vgmtopcm
+
+:vgmtopcm
+neoadpcmextract.exe %1
+goto pcmtowav
+
+:vgztopcm
+copy /y %1 temp.vgm.gz
+gzip.exe -d temp.vgm.gz
+neoadpcmextract.exe temp.vgm
+del temp.vgm
+goto pcmtowav
+
+:pcmtowav
+for /r %%v in (smpa_*.pcm) do adpcm.exe "%%v" "%%v.wav"
+for /r %%v in (smpb_*.pcm) do adpcmb.exe -d "%%v" "%%v.wav"
+del "*.pcm"
+mkdir "%~n1"
+move "*.wav" "%~n1"