Crown Molding on metal studs ?!? I am about to start my DIY project to install crown molding...

I am about to start my DIY project to install crown molding surrounded by my house but I have notice my studs (2X4's) are aluminum/metal. Usually people "nail" the crown moldings to the "wood" studs - no problem.
Question: In metal-studs, how can I "nail" it? I don't suppose it will hold my moldings!!! Should I make blocks of wood screwed to these metal studs and afterwards nail the crown onto these wood blocks? Any concept or how do the professionals go going on for resolving this issue? Thank you!
Tub faucet leaks--stem replacements didn't work. Help.?
Answers:    I would drill holes and use small screws. This would works best long possession and be cost effective.

When you pin molding to wood you use a lot of staple but with screw you wouldn't have to use essential as many (every 2'-3').

I suggest small head screws, counter sunk and puttied.
How do I rig a wall to roll...
Use "Trim Head" finishing screw. These are the screw equivalent to finishing nails. They enjoy a smaller head than the typical drywall screw.