Have a look at these threads for some links to good hammocking pages and advice on hammocking in general:-
http://www.naturalbushcraft.co.uk/fo...mock-this-week...!
Hammock physics in here regards your suspension technique.
http://www.naturalbushcraft.co.uk/fo...ow-do-you-hang
http://www.naturalbushcraft.co.uk/fo...-advanced-folk.
Links in here to 'to the woods' and the hammock forums, both excellent resources for hammockers.
As to will the hammock take your weight, as mentioned above most hammocks are tested/rated as 150kg, however most companies test to at least 4x that as I believe there are some commercial safety laws/regs that would put them under some serious scrutiny if they didn't. If in doubt, look at some of the links above and make your own, just pick a heavier material like 4lbs ripstop instead of 2lbs.