all of the VR6 stuff is different to
ibiza 8v or 16V - the hubs, the hub bearing carriers, the struts, the steering arms, the wishbones, the driveshafts, the arbs, the brakes....everything
you have to really know what you are doing to mix and match components
the best/easiest way by far is to transplant in the whole lot, everything on the front subframe including steering, front struts, hubs, brakes, everything
you will end up with 5 stud hubs - this can be sorted out, but it would be cheaper for you to buy some 5 stud wheels
the rear hubs can be swapped directly for 5-stud VR6 - simply swap the whole stub axle over with hubs, brakes, calipers etc
this is why the way to do this, is to buy a VR6 complete, use everything you can, then sell what you dont use.
even use the VR6 wheels.....