Sorry but with the Edge it does not work that way.
What you have to do is get the Dingo golden update.zip file - make sure you get the one for your device - then do a normal update as described.
Once you have Dingo installed and working you then get the Ermine update.zip - again make sure you get the correct one - and install that. You will then be back to where you were.
If, on the other hand, you have done something that prevents you following the normal process then you will need much more drastic measures that entail opening your device and using a serial cable - search in this forum for the problems vicinc had with his Pocket Edge, the same process works on the full size Edge.