Start inflating the tyre, but do so slowly, and
do not fully inflate. Pressure should be added in stages, encouraging the tyre bead to seat as you go. It is not unusual for most, but not all, of the bead to go into place with pressure of 10-15psi. If you see the bead begining to seat partially, STOP inflating, wait a little while and watch the unseated bead for signs of very slight movement. You can actually see and hear it moving, but you will need to pay close attention. If movement stops and no further progress after maybe 20-30 seconds, stop here and let the air out again.Releasing pressure at this point will give you chance to do two important things. One, by letting the air out again, the liner and tube will stop trying to 'herniate' between the rim halves (if there is still room enoigh to do so). Secondly, this is where wheel nuts can be tightened further. You may in fact find they can now be tightened very closely to completed torque, but they will always require final tightening with no pressure in the tube later.
Once wheel nuts are tightened as much as possible, resume pressurising the tyre. This time pressure can increase to near amount required for road use. One tyre yesterday required close to 25psi before the last section of bead went into place.
You don't need to increase pressure quickly, in fact it's probably best you don't. The tyre will seat the bead slowly at first, so let it do so at it's own pace. Just watch for movement, and add a little more pressure once movement has stopped for a while. Needless to say, it would be extremely unwise to place fingers between the rim and tyre while this process is happening, so I won't mention that! Make sure you have applied the grease liberally when you started, and keep the work area clean and free from rocks, pebbles, and other grit and contamination. You don't want any of that stuff to stick to the grease and get anywhere it can cause damage to tube at later stage.
Eventually the last section of bead will move into place. Sometimes it will move there gently, other times it may make that last leap with a sudden pop. Who cares how it happens, so long as it does get there eventually.
You're not finished yet. Let the air out again. Hopefully you still have the valve off at this point. With no pressure in tyre, look carefully around the bead edge and check that it is fully seated all the way around. Turn the wheel over and check the rear side bead too. I'll bet it looks fine back there. It seems to seat well, compared to front side. It is possible that there is yet more movement to be achieved, and letting the air out this final time will show you any areas that require more work. If all looks even, tighten all 8 wheel half securing nuts. Now install the valve fully and reinflate to desired road use pressure. That's it....youre done!
I must REALLY stress importance of checking tube and liner are clear of the two wheel halves as you continue to bring them together. It would be quite easy to damage the tube and/or liner as you go. I know this because it's exactly what we did on one of my sets, and that's why I only have 3 of the 4 sets I need. The final one has now been rectified, but this was after I had departed for home, so I need to travel again soon to get the final one! Whatever. I'm just grateful to my friend for all the help he has given me with getting these damned things together. Tyres are still available if anyone needs any. I will be happy to pass on the gentlemans contact number, just send me a PM.
The above information is proved as a description of how my tyres were installed, and it may differ from your requirements. Whatever the case, common sense and forethought should proceed any attempt to duplicate this process.