If you have a Driver's handbook...or a Bentley repair manual...there are exploded view instructions contained within....Tony *may* have these instructions on his site as well.
But...for the hood that remains with the cockpit (NOT the stowable frame found with the early MGBs):
Basically, what you need to do is release the front bow, side clips, interior snaps from the frame, and the lift-a-dots, then slide the rear retaining rod out from beneath the rear clips.
Lay the hood (top) on the bootlid and fold the quater-lite windows in (on the fabric NOT the plastic side-lite) and gently roll the rear winwod (now conatining the side lites) over the top of the hood frame. (Some folks use a towel between the rear glass to help prevent scarring). The whole top shold compact nicely (like a sleeping bag) and can then be stowed and retained with the leatherette straps that *should* be found hanging from the rear bulkhead.
The tonneau bar then goes into the slots on the side of the frame, and either the half or full tonneau installed.
This seems cumbersome at first, but when you take your time and practice a little, it becomes second nature...and your top will not receive any owner-induced damage. (The car looks better, too!)
Good luck!