From what I understood you want the drop down box to show the list of all stores. Then you need the source model of adminhtml/system_config_source_store
This is what you need and/or what you could do. Create a system.xml
in the module you created. Add a field to it something like this.
<store_select translate="label comment">
<label>Select Store</label>
<frontend_type>Select</frontend_type>
<source_model>adminhtml/system_config_source_store</backend_model>
<sort_order>20</sort_order>
<show_in_default>1</show_in_default>
<show_in_website>1</show_in_website>
<show_in_store>1</show_in_store>
</store_select>
The other options is to create your own source model
class [Namespace]_[Module]_Model_Store {
public function toOptionArray() {
return Mage::getSingleton('adminhtml/system_store')->getStoreValuesForForm(false, true);
}
}
And then replace the source model path of the system.xml
with the one you just created.
EDIT:
My Github
Checkout the commits with message "091115 : Admin Controller Base". Again this is just the base where you could start. You still need to implement the logic for the select to work.