Is this plugin working? I cannot seem to get it installed. Once I activate it, it tells me that require_once XML/Serializer.php is missing on line 6 of gCHeckout.php. So I look at the folder and the real path to it is PEAR/XML/Searilizar.php. So I try to modify it, and then it tells me that other file are missing. I try to fix all of them, and then I a get a blank page. Surely I've overlooked something simple to enable this plugin?
Yes plugin should work. May be you have PEAR in include path already. Please check aMember CP -> Version info what value you have for include_path setting?