Go to h**p://mitiok.cjb.net and download LAME 3.92 if you don't already have it. Unpack it somewhere and then take a look in the folder you unpacked it. There should be a subfolder called ACM. Inside is a file "LameACM.inf". Right click it and select install. You may need to reboot after it finishes. Hopefully you should be able to use LAME directly from Vdub afterwards. IMO though you'd be better off encoding audio outside Vdub and then using it or Nandub to mux it and video together.