I have installed about 2 dozen or more headset bearing cups with two tools:

1) A 4" x 2" x 3/4" piece of hardwood

2) A sawed-off pickaxe handle about 18" long. Makes a nice soft hammer.

Get the top cup lined up properly and tap them down gently. Soon as it's going in straight, hit it hard. Start gently! Flip over the frame & repeat.

I have no experience with carbon frames. I have built a number of steel & aluminum frames.