May I use a 6+4 in substitution of a double 5 to enter two pieces into play in Parchessi? Since I may use any combination which adds up to five to enter one piece and I am allowed to enter two pieces with a double 5, the rules been vague in this, It seems only logical that it may be allowed.
No. Each die is used in toto of itself. You cannot re-combine the pips in other combinations. As for the special case of entering, the rules are clear on this.
Pieces may only leave the nest with a roll of a five on a single die or the sum of the dice. A double five can be used to move two pieces from the nest simultaneously.