[DVDirect]

Hello,

For the Company Logo goto Edit Templates here you will see the directory images, in the images folder you will see the file companyname_small.gif
Resize your companylogo and name it companyname_small.gif.
Use the Upload file to the current directory at the bottom of the page to replace the default image.

2. Not sure on this one it maybe in signature.tpl in edit templates/mail/html/signature.tpl
Maybe someone else can assist with this answer.

Cheers