First close down Internet Explorer then click Start and Run. In the Open dialog box type:
(note the space after .exe and comma
and click OK. Probably best to cut and paste the line.
After restarting Internet Explorer the annoying ISP branding should disappear.
Alternatively, if you have SpywareBlaster, you can achieve the same object by going to the OE Misc tab and inserting the words you would rather see such as your name.