Please take care to desactivate dbal extension, it cancel the sql insertion.

When you click to install the extension it made all change needed on database and perform the insert static :

In tne Install you need to put the url of you web site and the url for accessing the shop (you may redirect all by .htaccess like I do). The last parameter is the page id wich will be used for traitement link (détail page principaly).

Important note : The domain of the site must be a real domain (or a dyndns / noip domain) because the meta_oscommerce try to retrieve the page trough this url.

After that you can refreash you browser to see the shop system in user part :

Follow all steps af the installation (and there you may change the « /typo3conf/ext/meta_oscommerce/mod1/oscommerce/ ») url, it must be the same than 'adresse of the shop system' inserted at the installation.

Thats all... You can now acces of commerce configuration.