Module development and code questions

I've posted similar queries, but I hope that this one is perfectly clear for a fast response.

I wish to modify the user_access function (from the user.module). The modification I wish is simple. Currently, this line:

Is there anyway to change uploaded files filenames.
Like day and time format.

doxument1.doc => 040406.doc

Hi, friends. I have a problem with developing of the one interesting module for drupal. Idea is:
Site has root administrator (his ID is #1) and this admin has absalute control. I need to make so that the site will have one more admin(with ID #2), but all his right will be assigned by root admin.
Example:

There have been several months that Drupal 4.7.x is available, and the module "Teaser Images" seems not to be compatible. It is a pitty since otherwise the images contained in the teasers are awfully displayed.

Does anybody have a good idea about making the module work in a Drupal 4.7.x installation?

hello everybody
I an new to drupal and want to display the image of same size but problem is that I have images with different sizes so the result it display will display the images of different sizes so it look very bad if anyone has idea about that then please tell

I'm trying to set up a drupal install, but need both nodes and comments to be able to be moderated (i.e. have scores assigned to them). The Node Moderation module does most of what I want, and has nice features, but lacks the ability to moderate comments. Thus I was thinking of adding this functionality into the module - would there be any major design problems with doing this?

Out of interest, why are comments not nodes?

Cheers,

vik