Few question almost vapor boom within shower..? renovating a small shower and tub. i'm going to staple a...

renovating a small shower and tub. i'm going to staple a 6 mil vapor barrier but i own a few questions..hope you can lend a hand
1. should i use a continuous sheet across walls or in section? if it is sections, what cartridge do i use to seal them
2. i know to staple top and middle but what something like the bottom. do i tuck the bottom behind the tub(don't construe i should do that) or do lay it over the lip and then cut it nearby. how do i staple it? i heard i should caulk it?
3. what do i use to video the holes when i push barrier over the pipes coming out of the wall?

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Answers:    1. continues sheet is best, video is not necessary if you overlap but if u want to be on the out of danger side there is red tuck video that works well beside poly
2. through it right behind the tub staple it near a regular staple gun bought at any hardware store.
3. tuck tape once again-red contained by color.

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