Module development and code questions

I want to customize E commerce module. Can any body help ???

Here goes the issue.

I have 4 categories for my products.

Type A
Type B
Type C
Type D

While making purchase of any product from above said categories. E commerce module is making track of all the events from purchase, payments and shipment, and appropriate emails are being sent to the customer regarding the purchase, payment and delivery of product. (all is working fine)

I am working on a module and have read that in 5.x anonymous users no longer have sessions. Is this the case? One of my references is drumm on http://drupal.org/node/86329.

running news aggregator. i'd like to have my feeds all listed in the content section. i found how i can add each feed category into the content section but it only lists the title of each feed's post. i'd like to list all of my categories in the content section but with the full blown posts like if i were to view each source (feed category). any suggestions?

Greetings

I'm trying to use view modules to show post from only one vocabulary (or taxonomy) term. How can I do to filter the view generated from the view module to obtain this? Argument? Filter?

Thx

Hello, when the admin creates a user in drupal, I would add this user to the system (Linux), but the order isn't executed.
My code is (in the module user.php):

...
if ($admin) {
exec('adduser $name');
}
...

Can you help me?

Thanks!!

Hello:
Someone can said me how install this module?
I put the views directory into modules directory, then i select it in admin->modules but when the page procces the request it show an SQL error, the tables in database hasn't been created.

In views module documentation i read that the database is created when the module is enabled.

Something are working bad, i could create database copy and paste dbquerys in mysql but i would like know why the database is not installed by default.

Thank you