To rig a buggy foil to fly on a bar; tie the main lines to the leaders at the ends of the bar and then tie the brake bridles to a single line ending in a leader going through a fairlead or a hole in the bar. The third line leader should be attached to a saftey leash. Adjust the 3rd line leader so that it does not pull in the trailing edge of the kite during normal flight, but make sure it is long enough so the when you let go of the bar it pulls the trailing edge in far enough to fully brake and depower the kite. You should be able to relaunch the kite backwards by pulling in on the leader line attahed to the brakes.
Out of the many bar set-ups i have tried, the one above works the best on my foils. I made my own bars out of aluminum tubing from a hardware store (ACE in the US) with the leaders made out of sailing line and the fairlead made from an eyebolt with some epoxy putty reinforement in the mounting hole.
Since you won't be able to work the brakes the way you can with handles, you may find that you will need to fly the kite in more wind (or more sining) to get the same kind of power you can get with handles. With the bar the kite will be much more controlable in higher winds and you will eventually learn to easily control the kite one-handed with your harness. The bar works well with a snowboard and is very good practice for the summer; if the snow is deep it rides just like a twin tip kiteboard.
If you decide to make your own bar or re-rig your kite make sure you test it out in light winds first.
I have made a few boards out of plywood and they worked pretty well. Hung's board design should also work well though you might find that you want a board with more rocker if you ride in a spot with a lot of chop. for pics and examples of plywood boards check out the files and old posts on the yahoo boardbuilding group at:
http://groups.yahoo.com/group/boardbuilding/
The best wind to learn in is sideshore to side-on if you have a large beach. Off-shore is alright if you have a reliable boat but the wind is usually more gusty. On-shore winds are considered unsafe because you are more likely to be lofted or dragged onto land. In on-shore it can be diffiult to get out through the waves and you need to be able to sail upwind in order to get out so beginners really should not try
