Here are some pics from my old rzr. I started with a normal Poalris slider base. I had to lower the seat to accomodate my wife (just under 5') but with the slider leaves plenty of adjustment to work for any driver. I just copied and pasted this from an old thread so let me know of you have any questions.
My description is gonna suck but youll get an idea of what i did.
Step one is toss these brackets in the spare parts bin as they are not needed
I then mounted the brackets and sliders directly to the seat (do not use the factory plastic base)
Youll have to oblong this hole on both sides to get the seat fit the brackets correctly
once the frame is mounted to the seat youll be able to set the seat in the RZR directly on the to seat cross bars center it on the bars and mark where to drill the holes to install the mounting bolts. The bolts i used are just basic with a 13mm head and about 2" long they are stuck though the track and then held in place with a jam nut to hold them in place when you install the seat before bolting down. I will probably upgrade these to grade 8's before i put the seat back in i just used what i had before.
After you drill the holes in the track and before you install the mounting bolts set the seat on the frame cross bars and mark your mounting holes. I just used a paint pen to mark the locations then drilled the holes. With the mounting bolts installed just set the seat in place and install the nuts on the mounting bolts. This can easily be done with the skid plate off or from up top with a little patience. I just bent the piece that the stock seat slides into forward a little so the modded seat track sits flat. In theory it and just be bent back up to be used as stock again if the need shall ever arise.
If anyone has any questions ill do the best i can to help out