thanx jamygdala!!
i've dowlodaed the jre based software named FLIP 3.3.4 from the mentioned site......
but dis software requires the BOOTLOADER software already loaded in d microcontroller.................so can u tell me wat dis BOOTLOADER actually is........and frm where i can get dis for free.........the micro cont i m using is AT89C51-24PI.......THANX AGAIN