need help with script and sed

[Jim Pazarena]

I would like to traverse my /users/home tree searching
for all regular files and change any lines which read:
   "/cgi-bin/Count.cgi ..." to:
   "http://counter.qcislands.net/cgi-bin/Count.cgi ..."

I kinda think that a 'find' with an -exec of 'sed' would do
it but I'm not sure, and even if it were, I'm not sure of
the syntax.

Could someone help me please?

Thanks!
Jim