Here's the link
t:
http://www.news.com.au/perthnow/story/0,21598,23561563-5005380,00.html
here's the part of the interview that rob talks about tobey's support
Whenever he got stuck on set, he called Tobey Maguire for advice. Maguire was also an unlikely superhero when he was cast as Spider-Man.
“It’s been an interesting marriage,” Downey says “There’d be times where I’d be struggling with how to play a certain scene and I’d call him and he’d really help me out. Or he’d send me a text message and say, ‘Hey dude, I heard Iron Man is going to be huge, enjoy it and have fun’.”
It’s that kind of support that sees Downey more grounded than ever. That and staying busy keeps him on the straight and narrow.