Modify an OpenSource project OpenEMR

On an already customized OpenEMR (Free and Open Source electronic health records and medical practice management application): * Modify form size limit of Social Security at "search" and "add" imput (Some php and SQL database needs to be modified) * By default, Administrator have Calendar available, this could be disabled by a menu inside the page but not by default. I want to have this user without calendar available by default at the time you install it. (Modify SQL entry) * On OpenEMR you can add a professional schedule, but you cannot delete or modify it. We need to add that. * Send an SMS to patient 2 hours and 1 day before he have a meeting with professional. I already have a way to send an SMS using an URL like "[login to view URL]", also there is an example script on OpenEMR that may be useful but needs to be modified. * Ticket print must have Social Security and Provider.