This issue is fairly well documented in this thread, but I can understand it is difficult to find info in such a long thread.
The GC pmt method is NOT suppose to appear on step 2 of page. This was suppose to be repaired in the last mod release. However the GC label still displays (without the radio button). So it is a bug in the mod.
I don't have a link in front of me but a "how-to" edit the appropriate file to fix this issue in this thread. (last month or so).
By default, the only pages the GC button should display is on the login and shopping cart pages.
/htdocs = /public_html = webroot
Delete the folder in htdocs. /googlecheckout belongs in your shoproot (zencart folder) not your webroot. (Unless the shoproot is also your webroot, which is how some merchants have set-up Zen Cart)
Woody
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