You don't put the frames from normal mini-nucs like Apideas and Kielers into normal hives, although I have seen pictures of mini-nucs where the frames could be clipped together so they made a full width frame. These were all home made I think. Ron Brown's book (see below) has a picture of this system. The idea of mini nucs is to use them for raising queens and once they have mated they can be added to a full size nuc. This needs less bees and frames than trying to raise your queens in full size nucs when you will find a proportion do not mate and the bees in those nucs end up standing around doing nothing until they are either given another queen cell or are united with a nuc with a laying queen. However, there is a view full size nucs are more succesful and this has been my experience.
"Hair rollers" prevent the problems you get if a queen emerges too early which can happen if you graft with a larva which is too old. They are also useful if for some reason you can't get to the cell raising colony on the day the queens are due to emerge - or lose track of the days! However, you will find it easier to time things so you move a sealed queen cell into the nuc or mini-hive and thus hair rollers are not really required.
You can also use hair roller for "queen banking" where mated queens are kept in a hive until needed. If doing it this way cover one end of the roller with tape so the queen has somewhere to retreat otherwise the bees will chew her feet. Queens kept this way can be kept for up to about two months maximum.
If you search this forum you will find a number of recommendations on suitable books. If you want an advanced one try David Woodward's book, otherwise Vince Cook does an easy to understand one although it doesn't cover mini-nucs. Ron Brown's Seasonal Guide covers mini nucs but is now out of print but your association may have a copy you can borrow - or try your local library. They should be able to source a copy.
And a bit of Googling will get you lots of description on using mini-nucs.