I'm interested in harvesting cells from laptop batteries, and have done some work to read out useful data from packs. I'm not really interested in rebuilding packs, but I have some across some information.
In addition to B2Eworks, there is also this software:
http://sbworkshop.com. It seems to have some relationship to B2EWorks, but I don't really understand how they are connected/related, and why the prices are so different.
I also came across
http://www.1bu8.com/en/, a Chinese site that specializes in stuff for battery rebuilding.
My impression is that some companies are more aggressive about locking down their laptop batteries than others. At one point, Apple used TI's default for the password to "unseal" their packs. I also get the sense that in many cases, the unseal codes are set not by the laptop makers, but by the "packers," the companies that assemble the packs from cells. They may use the same code across brands of laptops, and they leak out. It seems like a lot of this battery pack rebuilding happens in China and Russia, and eastern europe, so you may have the best luck searching for pack part numbers, and even the specific models of battery management ICs you find inside, then using google translate.
As for safety, people seem to love to tell scare stories about lithium ion batteries. They definitely need to be treated with caution and respect, but the scare stories are overblown. (Also, I really doubt that Skimask is checking the TV news in Guatemala) Rebuilding packs is definitely seems worthwhile if you are somewhere where wages are low and can figure out the unseal code and get the needed software/hardware. Even in the US, if you know where to look and what to look for, you can find new battery packs from old unsold laptops to use as a source of cells for ~$2/cell on ebay. They should have near their rated capacity, a healthy amount of life in them, and they will be well matched for internal resistance. You can probably also scrounge together some decent cells if you go through enough used packs. Definitely make sure the internal resistances (google on how to measure) are well matched, otherwise you will end up wearing out the cells prematurely, not to mention risking a fire or other nastiness.