Well I tried the live CD. It started to boot but then told me that I had an invalid partition table, and made some escape suggestions which I forget now, but after a couple of key presses I was booting into Windows. I don't know if it was objecting to my Win98SE/Linux dual boot arrangement with the ...

I have created a LIve CD, but am nervous of running it.
Does it write anything to hard disk when booting?
Particularly does it do anything with the MBR, because I have a boot manager there and do not want it to be modified?