From what I have read the wire must be 100% imbedded or the bees will not draw comb properly.
Not true, the bee will draw comb just fine around the wire. In fact, I use and recommend wiring foundationless frames as well.
I found a site that said to use a 24 volt transformer to get the wires hot so they will melt into the wax.
Another simple method is to use a 12V car battery charger.
I have been informed by many beeks that just pins alone are not enough to keep the foundation from warping, or falling apart during extraction.
I totally agree, push in pins are useless. then support such a tiny area of the foundation that they easily break through with just a minimal force.
I hear there is a tool with spurs on it for embedding wire as well.
Yes there is, I have never used one.
I wire the frames as tightly as I can by hand, and then use one of these to tighten up the wire.
You want the wire tight enough so you get a nice high ping out of it. Like plucking a guitar. When you heat the wire to embed it in the wax, it will loose some of it's tension.
Then I weave the foundation through the wires and install it in the frame. So a deep with 4 wires would have wires 1 & 3 on one side of the foundation and wires 2 & 4 on the other side.
I then place the frame in a foundation board, which is basically a board that will fit inside the frame, so when you lay the frame on it, the foundation is supported by this board and the frame is floating off the bench. This allows you to put some pressure on the wire and push it into the wax.
Then take the battery charger an touch opposite ends of a wire until it gets warm enough to soften the foundation. The time depends on the charger/transformer you use. It is a trial and error to get what is right for your set up. Just don't keep it on for too long or you will melt right through the foundation and cut it in half. As soon as you seen the wax changing color by the wire, remove the charger and immediately take your fingers and press the wire into the wax until the wax sets. It does not have to be entirely embedded. The purpose of the wire is to keep the foundation from sagging until the bees draw it out. Do the two wire on the top side and then flip the frame over and do the two wires on the other side.
Hope this helps.