Module development and code questions

hello guys,

I'm new to drupal and have been trying ti implement Ajax in my module.. but cant seem to make it work..

I need my module to create a block that displays 15 records from a database table. Bottom will show "More Links" and when a user clicks it should display next 15 records in the same block without Page Refresh.

Can u help me achieve that.

i need a fully functional code that can update records in the block

i have created the module that adds the block n can write SQL to change whereever needed but Ajax calls not yet...

I am seeking for a modul for a telephone or contact person list in a company. in best case the module can import and export the contacts.

Who can help me or know a modul

i have recently upgraded my drupal 4.7 to druapl 5.0 and installed the google sitemaps (XML sitemaps) module (http://drupal.org/project/gsitemap) the sitemap is not being generated now and when i open the sitemap url of my site it says

Error loading stylesheet: An XSLT stylesheet does not have an XML mimetype:http://www.siddharthfans.com/sites/all/modules/gsitemap/gss.xsl

I want to write a module wich meet this requirement :
- There is a select box include some items ( I've done it already).
- When i select an item in select box . It will change a variable "choice",which is a global variable.
I'm so new to drupal that i don't know how to do it.
Thanks for your supporting.

i'm building a health website. a service will be to online bookkeeping of users' various records. is there a module to do this?
thanks,
erick

i have a community. can flickr module support each user to have one or several their own photo sets from their own flickr.com accounts?
thanks,
erick