Oops, I read your post wrong and assumed (my bad) that you wanted to root just with a PC. You can download the needed files using your phones browser and issue the adb commands using a terminal emulator (make sure you have a terminal program loaded from the market) and use a program like Astro file manger to move the needed files to the root of your SD card. I would wait and do it with a PC available in case you run into problems.