Modify a simple Magento Plugin

I have a simple custom plugin developed made a while ago. It is fine but use a truly weird way to work. The plugin is used to relate categories together and render something like "If you are in a category, you may also like this other category". There is no apparent compatibility issue. The problem is that the plugin write the relations to the catalog_category_product table using negative product id for the category ids to differentiate them from the real product id. I want a modification to this plugin to have this data recorded to a separate database table, like pluginname_catalog_category_category. This is a small modification I need for my plugin. If you are able to deliver this on time and as per my satisfaction then I have a lot of projects in magento and wordpress for you!! Max Budget - $45 Thank you.