Module development and code questions

I decided that I needed to put some restrictions on photo's I have on my site. Has anybody else done this? I still wanted anonymous users to view my blog and leave comments, but not look at the pictures. I also wanted users to be able to create an account without having to wait for approval, so I decided just knowing who was looking was good enough for now. I am using Drupal 4.1.0.

installed amazon module as directed. when i click on "amazon" (after enabling it successfully in module section) i get:

Fatal error: Call to undefined function: la() in /home/.dahli/jmm/tfftech.net/dmain/modules/amazon.module on line 34

looked all over, not been able to find a function called la() anywhere.

what am i missing?

Hi,
I'd like to create a node that displays a chronological list of all posts by a user regardless of the node type and that returns it's own search results.

I'm thinking of fairly simple search results. I'd like site visitors to be able to type in part of a user's name and get a list of possible matches. While this is currently possible, I want the link to point to the chronological list of all posts and not to the user profile page.

hi, i'm using drupal 4.1 and image module.
I have a little problem in the home page: the image nodes don't display the "number of comments" link but only the "Add a comment" link.
I tried to hack the image.module file but i don't know how to do it.
TIA.

I can't seem to get how format plural works... Could someone give a simple eaxmple of how it works?
I tried to learn from the drupal core, but the code is to hard to understand for me most of the time...

Is there a simple way to implement a simple shop solution in drupal? Or maybe connect an existing webshop solution into Drupal?