MISTER ESTATE - Changing Field Data Types

Hi fellow Forumers,

Am in need of some desperate help, I am customizing Mister Estate for my own purpose and I need to change some field data types as well as add a few, one of the data types that is already installed on the system is to enter text but I want to change this to a check box, can you tell me how to do this, incidentally I have changed the variable in the database to a tinyint(1) the actual data name is toheat which is or was type of heating, i have changed the text in the language file to Close to Beach but I still have a text box for it, can you please tell me what file name if any I have to go to to change from to the new check box, also how can i add new data types,

waiting patiently for someone to get back to me as soon as possible, best wishes

Mark