In Joomla 1.7 how do i locate, access and modify a picture (eg:my website's header graphic) on the live remote server.

I've looked during my /images/ad banners/ folder and that i have looked all around the template manager.

I understand I'm able to get it done in localhost because i have the folders but I have to get it done on the remote server(the website has already been online).

Thanks.

Try right click the header image, click view image, around the url box u will se the path for that image. Search with ftp and replace.

Usually images for that templates are saved within the templates/images folder.