No, since you can't use RC_ALL.
You can only use the following races. The other ones are combined types.
RC_FORMLESS ///< Formless
RC_UNDEAD ///< Undead
RC_BRUTE ///< Beast/Brute
RC_PLANT ///< Plant
RC_INSECT ///< Insect
RC_FISH ///< Fish
RC_DEMON ///< Demon
RC_DEMIHUMAN ///< Demi-Human (not including Player)
RC_ANGEL ///< Angel
RC_DRAGON ///< Dragon
RC_PLAYER ///< Player
RC_BOSS ///< Boss
RC_NONBOSS ///< Non-boss
Yes. The renewal code won't be compiled. But if you want to, you can add only pre-RE code. (Note the 'n' in #ifndef. This means "if NOT defined RENEWAL".)
#ifndef RENEWAL
sd->subrace[RC_FORMLESS] = max(sd->subrace[RC_FORMLESS], 50);
sd->subrace[RC_UNDEAD] = max(sd->subrace[RC_UNDEAD], 50);
sd->subrace[RC_BRUTE] = max(sd->subrace[RC_BRUTE], 50);
sd->subrace[RC_PLANT] = max(sd->subrace[RC_PLANT], 50);
sd->subrace[RC_INSECT] = max(sd->subrace[RC_INSECT], 50);
sd->subrace[RC_FISH] = max(sd->subrace[RC_FISH], 50);
sd->subrace[RC_DEMON] = max(sd->subrace[RC_DEMON], 50);
sd->subrace[RC_DEMIHUMAN] = max(sd->subrace[RC_DEMIHUMAN], 50);
sd->subrace[RC_ANGEL] = max(sd->subrace[RC_ANGEL], 50);
sd->subrace[RC_DRAGON] = max(sd->subrace[RC_DRAGON], 50);
sd->subrace[RC_PLAYER] = max(sd->subrace[RC_PLAYER], 50);
sd->subrace[RC_BOSS] = max(sd->subrace[RC_BOSS], 50);
sd->subrace[RC_NONBOSS] = max(sd->subrace[RC_NONBOSS], 50);
#endif
~Kenpachi