ok first off id recomend not doing this opperation at all because its very difficult, time consuming and can ruin a perfectly good instrument. If you have a les paul dont do this because of the odd neck angle on the guitar and the floyd will never mount correctly. so first off your gonna need to drill a huge hole in your guitar to fit the fucker, then another one in the back to mount the float springs and sodder your groundwire to the spring holder. then you have to mount the trem stop screws by drilling 2 half inch holes into your guitar. next you will need to install the locling nuts over your orignal nut by removing it, drill holdes for the screws for the locking nuts and your almost done, then construct the floyd by attatching the springs and then string it by putting a book under the floyd so it sits level and has no tension and if its your first floyd your going to scream and want to break your guitar and give up on life completley while tuning and getting the floyd to sit level. on another note the guitar your installing the floyd on may not have a suitable neck for the task as floyd rose keep the strings in a flat poistioning not an arch like stopbars. so if your neck has a major curve to the fingerboard your strings will never action out correctly and then you'll need a new neck running about 200$ (min for a pos rosewood 22 fret dot inlay) so if you have the drills and tools needed, keep in mind this is wood not paper and you cant erase mistakes so be very careful, my advice is have a professional luthier with experiance to do this for you which will aslo set you back 300-500$ depending on the difficulty of the job so good luck and hope that was helpful
