The most important thing is to be certain that your spokes are the correct length for your hub and rim.
I did this at TechShop in Menlo park with regular tools, no special bicycle tools were necessary.
Step 1: Lay out the parts
Step 2: Insert the spokes - side one
This presents a problem as the spokes will hit the other larger flange. To get around this you can push the spokes with your fingers as you push down or just pull them where you want with a pair of pliers. Do be careful to bend the spokes as little as possible during this step.
In the pictures you can see the different ways of inserting the spoke and how I went about the task.