Module development and code questions

OK, so I am trying to adapt the Drupal Core Profile module so that I can add a selection list that is dynamically loaded from a database...

For example a Country selection list that will contain only the countries we are currently offering and as we add more countries the list will update automatically...

Has anyone dealt with this or know of a work around???

I have created a module, and binded a function from it's hook_menu... that function is run perfectly... in that function I run a function from another module (that I have declared a dependency to). this all works like a charm when it's regular html that second module is outputting. But now I want it to output a form instead and I am not quite sure on how to do that.

so to describe it some more...

I have created a new module, this is a simple module not a node module. The page of the new module has several collapsible links which open the forms.
There I have created form that is same like as 'create blog', I have used my own function to submit the blog but the values are not gone in the table 'node_access' in the database.
For the default blog module is using 'node_access_acquire_grants' function. But I am not getting understand how this function is being called for drupal's blog submission form.

I have created the new module and added implemented hook_block(). The content of block is a listing of categories. I had written a function which returns me this.

Please tell me how can i display the content of this block (from newly created module) after click on one of the primary link.

I had done all the settings through the Admin panel.

Please advice.

Hi i am using download module where i need capture user details like IP,download details etc but before this page i have one more page for asking use email id now i need to capture whole things at a time nd insert into mysql
can any buddy tell me how to use sessions or passing by url to track user mail id

Hi guys i need to capture download details like IP,address etc on click on button image
plz guide me,i am very much beginner for drupal