Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

so i've tired measurin up these seats (not this colour scheme though) for the car and the seats look like they can kinda fit just about as the dimensions are only just bigger than the corsas current seats. but i cant figure out the sub-frames and sliders. i know that i can use sparco subframes to put these in the car but was wondering if u think i can just put these straight onto the current subframes using the sliders included with the seats. And does anyone know if the sparco subframes mount to the same points on the chassis as the current frames for the OEM seats or will i have to fill/plate ova the original mounts and make new ones?
Anyhelp appreciated