Well theyre like any car seat, you simply undo the bolts that hold them down lol, then unplug the airbag cable. Not a massive job to do :p
As for if theyll fit, im sure they would, just get measurements for the sub frames and if they dont im sure you could have some made up.
 
I would be also interested to know if they fit...

If its a straightforwards install, it would be great.

However i am more interested in the bucket seat design as my Cupra ones dont seem to have good body support...

maybe the leon cupra ones would be great but i dont know if they fit...