Edit Magento extension to send catalog data in 1.6.2

We have a magenta store running on 1.6.2 that we need to be able to populate and update with our POS plugin: [login to view URL] It does not support 1.6 because according to them: " The 1.6.x versions contain an issue which prevents third-party plugins such as our connector from accessing the store" It will currently connect, upload the categories properly but it does not add or edit any product information. Rather than downgrade our store to 1.5, I want to be able to use our current version with the light speed plugin. This project will entail editing the magento extension files and possibly the MySQL API tables and core files to enable the connector to fully interact with the magenta webstore. Other than the extension files themselves we do not have any other information on how the connector works or why it cannot successfully send product data.