VRMixer.dep file has all dependencies required to build distribution with your project. 
Free S.Pennington library arsubclass.dll has same dependencies as VR Mixer itself.

All dependent files - except arsubclass.dll and vrmixer.ocx itself - can be distributed also using vbrun60sp3.exe downloaded from
http://download.microsoft.com/download/vba6/utility/1/win98/EN-US/VBRun60sp3.exe
  