These floors are expensive due to the time and skill envolved in laying them.These can be tricky to set out, so take plenty of time working where everything will go.
Allow yourself plenty of time, i mean days!.Lay the centre first, and use a long metal or wooden straight edge to work the edge to, allow to dry, then lay the border afterwards, as this will be fiddly.
It's up to you but i wouldn't use rapid setting adhesives, i'm sure the experienced guys here would as they have the confidence to get on with the job. Slow (standard) set adhesive will give you plenty of time to play with, so that you can adjust tiles and i won't go off too quickly in the bucket.