Thanks so much; the checkbox info will be a great help, as did your previous. Ive spent today figuring POST/GET with PHP though I understand PHP and HTML shouldnt be used together if possible, so once the box of bolts gets working then its getting methods to work more securely.
Got it working as far as file edit goes by clicking on any file it gets into edit mode with a very small no-frills PHP editor, and allows modifying, saving the edited file appropriately.
I'll post my work up here in the next days and any (constructive) criticisms appreciated.
Happy New Year - its tonight here!