From: DeskNow Knowledge Base
http://www.desknow.com/kb/

How do I use my own company name / logo ?
http://www.desknow.com/kb/idx/5/038/article/

In DeskNow every domain can have its own logo and company name. The company name is shown in the title bar of the browser, the logo is shown in the login page.

To setup name and logo for a domain, login as the admin user of that domain, and go to Administration / Branding.

Important: if you set a log for a particular domain, DeskNow will use it in the login page only if the login page is accessed with the proper domain in the URL.

For instance if your server is available at www.isp.com and www.virtualdomain.com , and virtualdomain.com is a virtual domain, DeskNow will show the logo for virtualdomain.com only if you access the page using the www.virtualdomain.com address.

See also this article for more branding: http://www.desknow.com/kb/idx/5/037/article/