Changing registration form

[domainkiss]

Hello,

I would like to change registration form:

I would like to hide time zone, DST and receiving e-mails.
Options shoud be the same:

GTM +2
Automatic DST
Checked - receiving emails from admins
Unchecked - receiving emails from members

I just want to hide them.

And I see that "time zone" template is the same in the registration form and in settings in advanced profile edit form.

I would like to have these few options only advanced profile edit form.

So I think I shoud edit register.php file... but I want to do it safely and still have these default options like "GTM +2" in the mysql.

Please help.