Yeah, what you said was basically right.
Grab the Philly, split it down the middle, take out the tobacco. It's up to you whether you want to leave the rounded end in or not, I keep it.
Then you got your wrap, just like a Royal Blunt kinda. Throw the weed in, twist it up, and there ya go.
Phillies are one of the easier blunts to roll. Have fun.
A gram will work fine, too. But two grams will work twice as good. And an eighth will work four times as good.