[NTG-context] Miktex breaks install

In a fit of madness I installed Miktex and now my minimals install is borked ("unknown script 'context.lua'...). Looking at the output it seems that Miktex has set a load of variables that Context is now using for itself. I suppose it would be nice to run side by side, but I guess I need to reset these variables when using Context. Is the texmfcnf.lua file the best place to put these? If so, then does anyone know what I should set the following to? SELFAUTOLOC SELFAUTODIR SELFAUTOPARENT TEXMFCNF TEXMF TEXOS Thanks in advance, Felix