Removing registration fields?

[gfxhelp.com]

I've noticed that registration for vbulletin is a rather painful and long process compared to other social sites. A lot of sites have started to requiring only username/password/email, 3 fields total to signup which takes about 10-15 seconds to fill. I have removed some of the fields, but I was wondering if it's possible to remove the date of birth and receive emails sections in the registration. I want to have people be able to fill them out in their profile details, but I want to make to actual initial registration as simple as possible.

So my question is can you customize the registration form in the vb options so the date of birth, or timezone sections are removed when registering?

Thanks