I don't know if you are taking the piss or just delusional Seriously, I don't know that much, I just try and learn from the many far smarter people on these forums like SteveL, SydneyKid, Roy, Duncan, etc, etc, etc. I also try and do as much on my car as I can: no better way to learn than first hand experience! I imported a GT-R a little while ago so I have been through all these steps already
My understanding is its no great problem if one of the ancilliary -- ie. aircon, powersteering -- belts breaks, assuming it doesn't damage anything when it snaps. If they look a bit frayed, I'd just replace them anyway as they aren't likely to be all that pricey. No direct experience in this area (my belts looked fine ), so maybe someone else can comment.
Lucien.