jQuery Grid Plugin - jqGrid

I am new to jqGrid and am very impressed.   On of my pages needs to have an existing table converted to a grid and the tableToGrid function seems aptly suited for this but I am having some issues.

1.  When using tableToGrid, my left most column gets a checkbox column added.  While nice, I dont need it.  How do i get rid of it? *** UPDATE *** I had a column with a checkbox, removing that checkbox also removed the left column with checkboxes. why?

2.  Attempting to wire up the ondblClickRow event doenst seem to work, however the same code for onSelectRow does work.  (note: I do call .trigger)

thegrid.setGridParam({ ondblClickRow: function(id) { alert(id); } });
//thegrid.setGridParam({ onSelectRow: function(id) { alert(id); } });

thegrid.trigger(”reloadGrid”);

Any suggestions?