answering my own post -> to use the update patch (1.02 for EUR, 1.03 for USA), original eboot + param is necessary (which i sadly can't find so far)
on the other hand, the eboot and param from the 1.00 fix work perfectly fine as long as there's no game data installed
generally i don't care about update patches as they are largely meaningless (imo) but SSX has proper updates and then there's the DLC too (which requires the 1.02/1.03 update)... so yeah, in this case would really like to update
Would honestly appreciate if someone can upload their original BLUS30849 SSX eboot + param as I don't want to rip the two from my game as that'll take a long time (grabbing the whole game from the net will take even longer)
Appreciate all help!