i have the panasonicDMR-E540V DVD VCR Combo ,whats the differance i between......... Panasonic DVD-RAM Disc for Video Recording, Non-Cartridge Style, 120 Minutes, 4.7 GB, 10 Pack, 2-3x-Speed OR THE.....Panasonic DVD-RAMs (LM-AF120LU5) AND THE.Panasonic LM-AD240LU 9.4GB DVR Double Sided Disc (240 minutes) ? AND WILL THEY ALL WORK IN MY PLAYER?????? Thank you !!!!!L.FIEL tri2dside@cox.net