I usually enter my route, then select the departure, for your route you will will want to fly to AKAVI after the departure, as you can expect to be cleared, joining H277 at AKAVI. When you select the departure you will get a discontinuisy, move AKAVI to after TY, on the LEGS page, LEGS page not the RTE1 page.
For smaller aerodromes the routes are sometimes found on the aerodrome page also, usually not to difficult to find them. You can save these routes useing the route designator, then useing the CO Route, Company route, to load it for each flight.
Thanks
James