You will find usually help comes pretty easy here. Unlike myself, there are some folks here who really know their stuff. ...Unless you start your quest with dupes and impatient "bumping" or have been a member for less than a day before you start developing an attitude.
i was told this forum is helpful perhaps i was mistaken. i will find another
My five year old stomps her feet while issuing meaningless ultimatums. You may want to give it a try and see if it helps any. :-)
Here is some information for you.
BEFORE POSTING (aka Forum Rules)
And as kmessinger has already told you, your theme is structurally incomplete. The footer structure you have removed may be contributing to just one of the many issues present. If the goal was to change the links, you can just go ahead and edit the footer.php file. The theme is GPL'd, so you can change it to say or link to anything you like.
You may also want to consider (after reinstalling a complete version of the theme) simply placing text widgets in the sidebar to contain your sponsor images. That way you can style each image inside of each text widget, while maintaining the integrity (location) of the themes sidebar and content area. Placing the images as they are, has apparently contributed to damaging both the content and sidebar areas. Just a few starting suggestions, if it's any help.
Do I have to visit the ftp?
You have to use an ftp client to visit your web space. Find the image in the Cordobo theme directory. Rename the old header. Name your new one exactly as the old one was. Now place it in exactly the same directory (with exactly the same dimensions) as the old one.