first i bought SEVERAL snake books. both breeding and general husbandry...the following site has some good books;
http://www.bigappleherp.com/Reptile_Supplies/Catalog/Snake_Books_13.html
and yes, i HIGHLY recomend the boa constrictor manuel. you will get a general idea of what breeding conditions should be like from all those books.
i then went to the breeder/dealer section in kingsnake...i clicked on everyones link, one after the other. many of those sites have breeding info. i then weeded through the info untill i took a little from this site and a little from that site. if certain info repeats itself in all these books and sites...then chances are it works.
somtimes information gathered from misc books and sites will contradict themselves. thats cause there is no 100% RIGHT way to breed boas. the authors gather info, either from thier own experiences or through the experiences of other breeders they interviewed. and opinions and experiences do vary.
you must also remember...that we breeders, for the most part, do not dictate when the breeding season is and when the off-season is...the boas "clock" does that. ask yourself why it does that...then do research on the weather conditions in the area your species of boas are from, during the general breeding season (sept-feb, give or take). then try to logically figure out why these times and conditions are optimal for the boas to breed. maybee they breed in the colder months so the babies are born in the warmer months to increase survival?!?! maybee the mothers prefer to give birth during some rain as to have the water wash away the blood and juices from the babies as not to give smells out for preditors to follow?!?!?! etc... just throw your own questions out there and then try to answer them, that helps alot when getting started.
on the other hand some of these males are typical males...horny like a maaaaa. just put them in and they do thier job. too bad its not that easy though...its the females, on the most part, that you have to stimulate by mimicking certain conditions.
just learn the basics (from books, sites, and posts)...then break down the breeding process into steps, and anytime u reach a new step then refer to your books or post here to get some opinions on how to continue, and we'll help you out.
i wish you the best of luck man...this whole boa game is fun as hell. it also makes you feel like a legitamet scientist (herpetologist) when u sucesfully produce offspring 
good luck, Nick
B.B.G.