ArticleMS Script Customization - Very Simple

Hello the script is articleMS, available at www (dot) articletrader (dot) com You need to install the script to understand what im requesting I want someone to tell me step by step (a tutorial guide) on how to do the following: - from the admin page, under the "articles" tab, where i can add new articles as well as edit existing articles, i want to do the following - To add a new field in the form (this field should be in the articles table), where this form, when first loading, it will popular a list of checkboxes, with the values coming from a different table in the same database. The field can be null. when submitting the article, or editing any existing article, i want to select these checkboxes (single or multiple). when i submit, i want those values to be stored in the same field in the MySQL table. its very simple, just i dont have the time to do research and do it myself. I want someone to write me a step by step guide on how to do this, and i'll do it myself.... to understand what i mean, you need to install the script and test it. this is the first task, i have other tasks later on (on the same script), so this will be like a start of more custom work i will need. i need this to be completed ASAP.