Hello 'shamrock',
If I understand you correctly, you want to change your email address on your account,
is that right?
To do that, you click the My eBay at the top of the page, then select the Account tab,
from the Left side column choose Personal Information, find where it says
Email and contact information, and to the far right of Registered email address, see
the word Edit, -- click that and away you go.
Or was it something else?