To insert new rows into a table using a custom dialog box

Hello. My goal is to be able to select any cell in a table , click a button with attached code , and have a dialog box come up offering to insert x-number of new rows after the row of the selected cell. In the dialog box would have user input: a) of the number of new rows to insert (defaulted to 1, maybe with a field with a spin control?), and b) if the new rows should be empty or clones of some of the columns in the original selected cell. I hope I expressed this ok.

In the sample spreadsheet, I would like to be able to (for example) select [E12], and insert down either partial clones of row 12 x-number of times (user input), or x-number of blank rows. Only columns C:I, L:L would be cloned down if clone copying is chosen by the user. I dont have experience in custom dialog boxes. I imagine a good way to pass the contents of a cloned row to the dialog box would be through an array, but I dont know how to set up and pass the array to the dialog box and then return the user input back into an .Insert Shift:=xlShiftDown to execute the insert. Maybe this is a common type of question. I appreciate if anyone has a 'canned' solution they could share. Thanks very much.