Hi:
I'm using zc 1.3.8a on a linux server running cpanel.
I wanted to upload the simple SEO URL mod and read the readme file carefully. Subsequently, I installed Shared Class rev182 and Module Manager. I'm assuming the creator of this mod wanted us to upload admin/template, a directory not previously present on the install.
the readme for mdoule manager had this in the bottom2. you can also init and call module installer to automatically check and upgrade your module database each time the user visit certain page inside admin (for instance: your module manager page)
require_once(DIR_WS_CLASSES.'module_installer.php');
$module_installer = new module_installer();
$module_installer->set_module('your_module_code_name_here'); // make sure you use the module code name as the name of the folder that contains your db patches and such
$module_installer->upgrade_module();
I have no idea what to do with that.
when I logged into admin/tools/module manager, I now have the following errors showing at the top:
Failed: 1

ERROR: Cannot create table module_version_tracker because it already exists

Note: 1 statements ignored. See "upgrade_exceptions" table for additional details.

Failed to set up version tracker table
When I click on List all Modules, I get these errors:
Warning: array_keys() [
function.array-keys]: The first argument should be an array in
/home2/tinamh/public_html/shop-lela/admin/includes/templates/templates/module_manager/tpl_list_modules.php on line
6
Warning: Invalid argument supplied for foreach() in
/home2/tinamh/public_html/shop-lela/admin/includes/templates/templates/module_manager/tpl_list_modules.php on line
7
Warning: Invalid argument supplied for foreach() in
/home2/tinamh/public_html/shop-lela/admin/includes/templates/templates/module_manager/tpl_list_modules.php on line
13
Update
when I click on install new module, additional error at the top says:
Warning: Invalid argument supplied for foreach() in /home2/tinamh/public_html/shop-lela/admin/module_manager.php on line 34
uh, what did I do wrong? 
I'm nearly done with this project and need to have the simple SEO URL installed by end of week.
thanks