have a hive u want to combine? have an extra queen and a 3 story hive? never fear, the simple 2 queen method is here! you simply take a 1 or 2 box hive, making sure to trap the queen in the bottom box with a queen excluder, or simply put a second box on, or 1/2 inch shim, with QX in between. then, use the newspaper method, putting a second QX on top. after all this, add your second hive to the very top, queen and all. MAKE SURE THERE IS A TOP EXIT!!!!! it is necessary.
don't feel like auger holes? just invert the bottom board from the #2 hive, add a board to make a porch for them. usually a 2-3 inches is enough.
You can also add a second box to the lower or upper queen chamber, simply make sure you put the QX's so the queens have access to them.
obviously, you can add deeps, mediums, or supers for honey on top of the whole hive.(if you do this it is HIGHLY recommended you use an auger hole in the top brood box)
this method has been tried and true years in the past, but as far as i know, it has widely gone out of use in recent years.
it is highly recommended because: it gives twice the breeding power(so more honey gathered), two queens- so if one dies the other can be used, for combining 2 hives(if one isn't doing so well, you want to store a queen, or many other reasons that benefit the simple 2 queen method.