upgrade predicament

["Chris Hanes" <chanes () ig2 net>]

I inherited a 7507 running an old 11.1 release that does not support
FEIP2;  I need to upgrade the IOS to support a FEIP2  blade but in order
to do this I need the ethernet access that I don't have.  So I'm in a
catch 22 here.  Any thoughts on what I should do?  I'm not the Cisco
expert and I can't seem to find a way to upgrade the IOS over a serial
connection from my pc.  I'm thinking I may have to setup a T1 connection
into the Cisco just to have TFTP access.  I hope there is a better way.
Thanks for the help...