Google Checkout module for ZC 1.3.x (beta)

[BlessIsaacola]

After successfully testing on a test store, I tried to use it on a live store and I got this error when displaying the contents of the cart:
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Warning: main(admin/includes/configure.php) [function.main]: failed to open stream: No such file or directory in /public_html/googlecheckout/gcheckout.php on line 33

Fatal error: main() [function.require]: Failed opening required 'admin/includes/configure.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /public_html/googlecheckout/gcheckout.php on line 33
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I think the cause of this error is that I, as any ZC user should as recommended for security, have renamed the admin directory.

Line 33 on googlecheckout/gcheckout.php reads:
require_once('admin/includes/configure.php');

I think the instructions should mention one should change this line if the one has renamed the admin directory.

Better yet, the code should be smart enough to read the current admin directory instead of being hard coded. Thanks for sharing your solution with the community.