Disable all User Editing

Hi I'm new and still setting up Hikashop. Best cart application I've tried.
Is there a way to disable all "Joomla user account editing" features in Hikashop? Examples:

1) On Hikashop User Addresses screen, if I click on "cancel" it will go to the User Control Panel screen. I don't want that.
2) Without logging in, clicking on "Customer Orders" will display the Joomla log in interface. I just want to display a message like "please log in first".

Basically I do not want any Joomla User Login and Registration stuffs to be shown. They should all be replaced with simple error message like "Please ensure you are a Registered User and have logged in". The reason is that my site does not use the Joomla login/registration interface(and that's because I do not want any user data changes like "reset password","edit email" etc)

Thanks to anyone who can give some hints.

Thank you.

1) I found the file address/form.php. You said "remove the code of that button near the beginning of the file". Please tell me which lines I should remove. (I can't do PHP code... so embarrassing)

2) On Joomla 1.7, I removed the section containing "forgot password"and problem SOLVED as according to your suggestion!

By the way, is the behavior of menu link "User Addresses" different from "Customer Orders" ?
Clicking on "User Addresses" without logging in shows an empty page and does not bring up the Login Box, as in the case for "Customer Orders".

It should be the file "address/listing.php" and not "address/form.php" where I found this code to be removed. Great, that took care of the User Addresses cancel button.

I did the same for Customer Orders in the file "order/listing.php" and removed the cancel button as well.

Thanks for the solution on using joomla menu link for registered users, I had forgotten about that. I need to skip the control panel as it leads to the edit profile.

SOLVED - Closing this thread.