RoinikHead gaskets are easy to do. You might find that you have a couple of hydraulic tappets on the way out if you've done a bazillion km.
So the list to contemplate:
Top overhaul set: Skandix have the overhaul gasket set
Whatever hydraulic lifters have failed (i.e. they don't compress in your fingers): Skandix have the hydraulic tappets.
Timing belt change: Skandix have new timing belts.
Check the oil pump: The oil pump bolt grade needs to be 10.8 and get the part number on the oil pump gear to check that it has been upgraded.
Do the head in oven thing as above and get it checked for being straight (if not, get it skimmed). Get the valves lapped. Put it all back together, time it all up and enjoy. What year is it?
Especially in English hahaha...