Do a Google search. I remember seeing one way back where the guy hooked it on his boot laces to take it apart. Tried it and it worked. Hard on laces though.
Yes it can .... I've done it in the past several times to check the firing pin and clean-out residue crud. There are several vids on you-tube on how to "field-strip" the bolt. A video is worth a 1000 words in this case IMO.
Yep, all you need is a shoestring... a quick google or YouTube will explain with pictures, but step on both ends of a string, loop string over firing pin notch and pull against string while turning rear pin. Once the pin is out of the notch and turned you just unscrew it from the bolt body.