Module development and code questions

I'm creating a tabbed menu and I'm passing the node ID as part of the path for each menu item. It works find for all but the default menu item, in which case the arguments are stripped off the path for some reason. I've run across this before and was able to work around it, but this time, I don't want to work around it. Is there a logical explanation for that or a way to have the argument passed to the callback?

Thanks in advance.

I can't find the gsitemap module anywhere, is it still available? and if so wherere at.

Thanks

How do I create a a cck field that allows for array submissions?

For example, a form that allows for unlimited children of a field.

So you could have variable arrays of items on forms.

How do I add a new flexinode or cck type that automatically uses the js.tools calendar popup?

It sounds like it would be simple to do. One for Date and Time, and One for Time only, if possible.

Regards,

Dave

I'm developing a payment gateway with a Spanish bank and they want to recibe the payment request with a POST form. All the payment gateway developed I saw use the GET method for the submit. Are there some way to generate a form submit with a POST method with drupal or with PHP? Do you know some payment gateway submiting payment request with the POST method?

Best Regards.

I'm creating a custom node module, and am having trouble deciding which hooks to use for various processing tasks. What I'm intending to do is patch together various form values to create the "title" and "body" for my node. Initially I did this in hook_insert and hook_update, which worked well except for one thing. Since these hooks are only called on "submit", when I "preview" the node, it has no title nor body. So I need to place this code into a function that is called on both preview AND submit. Any ideas?