at present time (2011) megatune is mostly obsolete on vems as all recent firmware versions are only compatible with vemstune, a user interface that was built from scratch and covers all aspects of vems tuning (including firmware updates directly from vems servers, wbo2 sensor calibration, logging and of course, tuning). some users who run older configs still use megatune but majority is now using vemstune which, after long developer phase, is now very usable.