Module development and code questions

I am getting the following warning in every page. I am not sure exactly the source of this warning message. The warning message start to appear while I was trying to customise search.module

warning: Missing argument 1 for search_box() in C:\Program Files\xampp\htdocs\drupal5\modules\search\search.module on line 1033.

I have been looking through the modules and am a little lost on if the following is possible with any current module:

Currently I am developing a site for a modeling/acting agency that will have a "page" for each person with several pictures and personal information. The profile page looks promising, but it looks like it is only for registered users and it looks like each page needs to be manually created. There will be one page look with different information for each user.

So far, it looks like I will create a vocabulary for each type of person (model, actor, voice over, stylist) and then will create a separate vocabulary for the characteristics (gender, hair color, eye color, height, etc). One question is if each person should be a node? I might be able to use views to limit the search to only female models. Some comments make it seem like each picture should be a node?

As far as I can tell, it seems like the current galleries are limited to use as just galleries. Would it be possible to create a template and then just update the pictures and information based on the current person? It would almost seem like a shopping cart type module, but without the prices or checkout capabilities (although, it would be important for clients to save their choices in a portfolio).

I wonder if somebody know about a module that let me create an internal message system??.

I mean, a module that let me send a message to another register user and when this user log in, find a place where he can read the message in the site, it´s not a really email account it´s just an internal message system.

Just like Xoops system do, I think it´s the only good thing that xoops has.

Excuse my English please.

Somebody can give me some light about this issue, please.

Regards

Hi

I just installed the page lang module (http://drupal.org/node/147615) which is supposed to enable you to change the "en" in the html tags at the top of the code source into whatever language you're using, but in my case it is not changing anything.

I'm using drupal 5.1

Is it just me or is that module not working?

Thanks
Mat

I have started to create a module about restricting access to file attachments based on roles for nodes that are accessible by everyone.
The idea is there: http://drupal.org/node/147026

Can someone list the Node access modules?

As stated in: http://drupal.org/handbook/modules/og
Organic Groups: Enable users to create collaborative groups, You cannot use this module with other node access modules.

So to beginne the list here is what I found:

Taxonomy

Are there others?