cck module development

I've jumped in the deep end of module dev by trying to hack a contrib module. I've learned a lot by dissecting almost every line of code. The module (tablefield) basically just creates a new CCK type and widget of type table so you can have a grid of data within a node. Pretty simple, it allows you to import a CSV file and has a button to rebuild the table adding either rows or columns. I've added a new button to swap the bottom row (when you add a new row it creates a blank at the bottom) to the second row (1st row is always the header).