Accessing DataGrid column items

I was wondering if anyone knew how to access column items…
ie if i made a column named “Info” and wanted to get the 5th item how would i go by doing so… i though it was just an array something like this
my_dg[Info]* were i is the index counter… but that wasn’t it… i can get it to display the column name but thats about… anyhelp is helpful

ps… also had a question about flash and saving data locally…
i tried using MMSave(mystring,"/myfile.xml") but it seems that it always saves in the path C:\Program Files\Macromedia\Flash 8\en\Configuration now i know i could just do MMSave(mystring,"…/…/…/…/…/myfile.xml") and get it to save in the C:\ but i wanted it to be saved in the same path as the swf… anyhelp with this would be helpful…

Thanks