"What have your inclinations have to do with anything? This is my body," evil Isaac snapped back.
"Which I am also inhabiting, in case you haven't noticed!"
"Well, whose fault is that?"
"Shut up numbnuts."
"They wouldn't be numb if you'd -"
"Stop your whining. There are more important things to do."
"Who died and made you king?"
The mental arguing continued for a bit as Isaac walked down the street. Not long thereafter, he stopped by the bank, and came to the conclusion that he was going to need some money in order to implement his plans. Thus he discreetly shapeshifted and seeped his way into the bank vault. Once inside, he used his telekinesis to disable the security system and create an escape route.
Well, why go looking for one already there when you can just move a whole wall out of the way?
He gathered all of interest in the vault, shifted into a car and drove off to a local department store. Then he paused, considering the matter.
"Well... I could do the remote shapeshifting thing... be a person and a car at the same time, but connected by a string of shapeshifter liquid..."
"Too risky. All these cars going around. String might get cut. And then were would we be?"
"With any luck, not with you!"
"Well, la de da dah. Say, no one ever said it had to be a string of liquid. It can be a string of surface. That wouldn't be at risk."
So that's what they did, and Isaac used some of his stolen money to purchase suitcases (and some new clothes, just for the heck of it), to put the rest of his stolen money into.
This done they drove to one of the more luxurious hotels. Once there, he shape shifted into two alternate personalities, male and female, and took up his suitcases. Then he shapeshifted his car back into himself, now no longer needed, and headed inside to book his room.
After supplying suitable false ID, and such, Isaac obtained his room, and they headed up the many floors to it.
"Well, that was fun. So, what's the next order of business?"
"Recruitment."
Insert evil chuckle here.