I have the BMW hardtop too on my 2001 330. Assuming you also have an E46, no tools are needed.
There are four anchors, two in front and two in back. The two in front are levers under the sun visors. Push in the silver button and pull both levers down. The rear two are hidden behind two covers where the C pillars would be. Like your gas cover, just push in and they will release. Then inside there is another lever. This one you pull out. Release all four, and you should be able to lift your hardtop straight up and off.
You DEFINITELY need two people. It doesn't weigh much, but the rear anchors have two metal poles that stick down. . .and with only one person you're likely to put a couple dents in your body panels.
Another bit of advice, don't set the hard top down on its edge in your garage without putting something between it and the concrete. Even if you set it down gently and don't grind it at all, you'll still scratch it up a little. Before putting it away for the summer for storage, I'd recommend putting your convertible top up. . .just in case it's broken or frozen over the winter. That way if you have to put the hardtop back on, you don't have to dig it out of storage right away.