Arctic,
Well there is not much that you could do. Assuming that you have a battery you might have instruments depending on what type they are so I would maintain my x-check and attempt an engine restart. If that does not work the best thing would be to transmit a mayday, maintain your best glide speed, tighten your harness and hope to not run into something big! Have a good look at what the ground elevation is so you will have a good idea as to when to expect the ground. Basically single engine IFR in IMC you're screwed with an engine failure.
cheers
SPC-9