Only select one cell in a matrix table

Hi there,
Has anyone got any advice to customise a matrix table, so that only ONE cell in the whole table can be selected?
I have tried changing the name of all the radio buttons to be the same, however this is not having any affect:

//Get all the radio buttons
allRdbs = jQuery("input[type='radio']");
//Change the name attribute to be the same
allRdbs.attr("name","affect");

TIA :)