Theme development

Using Chameleon Theme...

I'm most interested in using Drupal for content management. However, everytime I make a page or an entry, it shows the user name and date beside it.

I don't care that a record has been kept of content being posted or made. What I want to remove is the display of author and date from these entries.

How can I remove the username and date from being visible upon publication?

is is possible take a function that is inexplicably unthemed, like say the user login form, and make it themeable? I was thinking of implementing hook_user in my module
writing my own personal theme_* function to display the login form elements
in hook_user unsetting the existing variables and adding in my own form output.

The necessity of erasing the existing form gives me pause... is this the way to do this, or is there a more standard way?

I've been looking in the code and uneasily it seems to me that one can not theme the form shown for the user login, or registration. Is this true? If i need a custom user login form do i have to implement that in a module?

Is there some way to make diffrent themes for difrent pages(module?)
The theme I am using is an XTemplate theme.

Is it possible to get the img src attribute from the node id? If not, where is it?? ;-)

Sorry if this has been answsered (I did try to do a search before posting), but is it possible to theme a specific block using phptemplate like how nodes are?

Specifically, I want to be able to theme a block like how a node can be themed by simply naming a file node-$nodename.tpl.php

I did try to theme the user block by creating a file named block-user.tpl.php without success.

I'm just wondering because there are certain things that can't be styled soley through css.