Cold tire pressures are tough to guess because there are a lot of factors that play into how much pressure gain you will get for a hot pressure. Nitrogen vs air, water content (even with N2, unless you are purging the tires) and even setup/driving style will have some effect.

My experience has been to get hot pressures between 42-44 psi which for me typically means starting at 35-36 front (FWD so more heat) and 38 rear but your mileage may vary. That is with N2 but without multiple purging cycles to drive out all the moisture.