"They" did not put RR5 together at all. RRs was a compilation of old content bumped up to Dreamcast level visuals in under a year though... pretty impressive admittedly, but so is RR6 in similar ways (framerate, level detail, etc). But we need to remember, this isn't the RR1-5 team.... it's the team who made Moto GP1-4, Racing Evolution, Rune Chaser, RRs and RR6.