I was not able to create files with .dot as the leading character in windows. I had to create the leading dot named files on the Roku PB. Once created you can copy and edit the files in windows using textpad etc.
I should mention, you could create the files with Windows on the CF card and then rename them by means of a telnet session to the Roku.
I use Barry Gordon's RokuFH, a graphical interface tor telnet'ing into the PG. That way I don't have to try to remember VI commands or the Linux syntax. http://www.rokulabs.com/forums/viewtopic.php?t=3092. Occasionally it hangs and fails to copy a file to the edit window but otherwise its easy. You coul copy the code in my post above and paste it right into a file on the CF card using graphical telnet.