Here is my attempt:

Obviously this will not work, so is there a way to do it better?

MrTwoVideoCards wrote:
Carving kills Kittens man.

I know, i was desperate.. Still havent found a better way lol

Oh my god you carved that?

Use the vertex manipulation tool, Alt+E. Actually, read this:

http://hl2world.com/wiki/index.php/Creating_Domes

The images are gone, but the idea is still there.

msleeper wrote:
Oh my god you carved that?

Use the vertex manipulation tool, Alt+E. Actually, read this:

http://hl2world.com/wiki/index.php/Creating_Domes

The images are gone, but the idea is still there.

This is most confusing.. Would you be able to explain it better

The tutorial does continue on to say how to make a spike come down from the center, but just stop before that section if you want.

Hope this helps