Drupal 7.x

I'm in process of deciding whether I want to use external DB or not for storing data of several customers. Customers should not have access to any data of other customer(s) and even a customer may have multiple levels of hierarchy e.g. manager has access to all the customers data but blue collar one only subset of customer data.

Creating a web page for a service company. In the taxonomy, I have a category that lists the cities the service company provides services too.

I have a template of some text, which I would like to use for every taxonomy term. What I mean is when the end user goes to the game that corresponds to some city, it will display the text w/ the cities name.

IE:

Service Company in [TAXONOMY TERM NAME] Area. We offer blah blah blah n [TAXONOMY TERM NAME] and surrounding areas.

Im currently working on my first theming project and Ive run into a bit of a road block. Im making a website with multiple cck content types each of which requires a unique page template. Ive figured out how to edit the content type node templates but how can I do the same for the entire page?

For example my about us content type node template file is node--about-us.tpl.php but I cant seem to find a way to specify the page as well.

I am trying to build a simple calculator module or I should say I am trying to learn the principals required to make a Drupal 7 math/calculator module that simply takes users inputs (form(numbers)) and dose some math on them and then displays the results on the same page with out a page refresh. dont need forme validation because not going to db; just calculating and displaying results.

I have been able to get hook_menu to work and build a path to js script function to work in my .module file:

I may be making this harder than I have to, but I just cannot seem to grasp what I have to do to accomplish my goal.

I have done a lot of searching on Taxonomy and how to display specific content on specific pages.

My goal seems simple enough, I want to be able to "categorize" a blog entry, so that it is displayed on a specific page. I am pretty sure it's all done in taxonomy, but for the life of me I cannot make it work. Is it possible, and what are the basic steps to do it?

Sorry for such a noobish question, I am pulling my hair out.

Im trying to make work some image gallery for my site and my first choice was Gallery formatter. I made an attempt with Drupal 6 first, without luck. The module is there, but the options that should be configured simply are not where they should be and there is not content type to create a gallery. Tried Drupal 7 then, same result. I cant find any error or message, simply the module is there, enabled, and the image formats are available, but no Gallery content type. Can somebody give me an idea?