When u write a post (or page), pls look at at the right top corner. There is SCREEN OPTION Drop down menu. Click it, and u will find how to add ‘custom field’. For this theme, you just need to enter ONLY the name of ur images to value field. Of course your images have .jpg format. If u want to change this format so that u can enter another .png and/or .gif, u must edit file slide.php.

Go to Admin panel > Write post
Give post title, and write down the content.
Select Add media > Add an image > Upload your choice of image (size 200px X 120 px )
Scroll down to the Custom field area and set the key name as homethumb (case sensitive) and enter the full path to the image you uploaded in the value field.
Make sure you enter the full path in the value field, e.g. /files/2009/12/example.jpg.
Then add the custom field to the post.

I can’t find Custom field area to setup thumbs. Is any additional plugin required or am I missing something else. I’m using wordpress 3.1.2 version.

Thanks for any help.
Alekksa