Mike, Keyaam has to move one tank and place the new one in the same spot, i think thats why he has to rush it.
Ok, heres what i have done previously with good results;-
You will need, plenty of spare containers for old and new water, prepare as much spare new water as you can.
Collect and retain as much tank water as you can - seriously, once you start to move things your tank water will go bad - due to the stress involved and the moving of rock, so collect off 25-30% of your tank water first, the rest i would discard.
Remove the all tank water you can.
Remove all the live rock and coral into containers with more tank water, give the live rock a shake to remove detritus as you take it from the tank.
Once all the rock/coral is removed, catch all your fish and place them amoungst the coral/ live rock - they will be albe to hide so less stress.
Empty tank and remove.
Replace with new tank.
Add live rock and NEW substrate (keep a couple of cupfulls of old substrate to seed new) you will need to prepare new substrate before starting the move.
Add as much tank water as you have collected in step one, then fill with fresh which should be the same temp and salinity as the old.
Add live rock+coral
Add fish by acclimatising them in the usual fashion.
Finally, and very slowly, add your CUC to the new tank.
I have replaced over 40 tanks using this method with great success, i'm not saying it is the only way, but it is the only way I would go. Good luck and be prepared for a very long day.
Add liverock and coral