Not trying to be a jerk or anything, but living in France, l'origine de Kro, for the Love Of God Why???
"Seize" (pronounced 'says') as it's called here is without a doubt the. worst. beer. I. have. ever. tasted.
To be constructive, if you really want to clone it, you're going to need to amp up the acetylaldehyde and make sure it's got either skunk (sold in green bottles) or a strong chemical bite. I am not 100% sure but I believe Kro does the 'fermented under pressure' thing to speed up fermentation from what would normally take ~2 weeks to less than three days.
The recipe you've got there looks like it would make a tasty beer, but if you really want to clone 1664, you might as well try to clone Olde English.
If what your neighbor wants is a drinkable light lager, brew a cream ale or CAP, which will have much more 'interest' to it. That's my opinion anyway.