Module development and code questions

The privatemsg module isn't working with a new drupal site I'm building, though it's never given me any problems in the past. I was wondering, for the sake of my sanity, if the 4.6 version of the module would work with Drupal 4.7?

(Specifically, my problem is that messages are not being sent even though it says they are.)

I need to add some custom fields (e.g., company) to the Address module in the Ecommerce package. I could do this by modifying the module itself, but I would like to avoid changing the Address module and the ec_address table themselves, so there won't be issues when these files need to be upgraded to new versions.

Before has modules to call automember, may defer to the establishmentautomatic promotion permission power, now, what hadn't had to beallowed modules to be allowed to replace?

Automember: (4.5.0)
Automatic user permission power management. The manager mayestablish the different standard, automatically assigns for the userthe different permission power. For example will only open the limitedpermission power for the new registration user, after the publicationcertain number article automatically becomes the senior user andobtains the high-level permission power

Has anyone ever created a basic AJAX module for a rotating banner? I know Joomla has one, but I could not find anything for Drupal. I would like to find something similar to what you see at this site http://www.phpied.com/ajax-banner-rotation/. I'm very new to Drupal, and I don't have the necessary skills to create a module on my own, but if someone could point me in the right direction or assist me in creating such a module, that would be great.

Hello,
I saw this information on the form API : Adding your own extra _submit or function using hook_form_alter

Does anyone has an example of this?? I've tried to implement it on my own module but I guess I'm not doing it right.

Thanks for your help,
MP.

Hello, all.
I found this module and i must say that it rocks. It is also pretty easy to add new buttons with different actions... (i am a dummie in programing).

But there i have a problem and i am quite sure that it can be solved.
There is a button to add a link. You get a popup to enter a link and then it gives a html code in the text box.

Now, i have an overlib in my site and a code of normal link with overlib included is like that: