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You MUST have a water bath saw to cut glass with a power tool. A wet tile cutter saw is fine.
A fourth method is to put the bottle in hot water and then cold water (and repeat if necessary) after the scoreline is made. I cut a couple hundred bottles this way in probably a total of ten hours. It is fast and easy, but uses a lot of the kitchen.
This you may have to do by hand. I would practice the general principle on round bottles first. Then on a "rolling" table or with a jig cut straight lines on the four sides and connect them "free-hand". Repeat this scoring a couple of times. Use your most useless bottle first. IT WILL GO WRONG SOMETIMES! Above all, be safe. My word glass is sharp!