Deprecated - Drupal core

Hi im using drupal 5.2 and whenever i register new user i get this Warning and i really dont know how to figure this out

warning: mail() [function.mail]: "sendmail_from" not set in php.ini or custom "From:" header missing in C:\xampp\htdocs\drupal1\includes\common.inc on line 1991.

please guide me how to get rid of this problem

and in drupal 6.2 im getting this error again while registering a new user with an email address

My Drupal site that displays maps through the Google Maps API stopped displaying them in Internet Explorer 7, although it continues to do so in FF, Safari, and IE6.

Here is a current example from the Google Maps API developers site. It displays OK in IE7:
http://code.google.com/apis/maps/documentation/examples/map-simple.html

I created the content type(assignment) by using cck.But whenever the content is created using this option
it goes inside the blog.Now i donot want the content to go inside the blog. Any help is appreciated

Helo, is there a way to add upload file type field for User registration instead of using Webform module?

Any clue or help are appreciated ^^

Cheers

I'm making an e-commerce website. I can show product. I want show product detail to following table when I click item product. Do we have a module to do this? Please teach me ^_^

I want to show image follow scrolling. Then I installed taxonomy_ticker in my Drupal but it present link ,don't have image. How to show image with link? Do we revise taxonomy_ticker? Please teach me how to do that?