WIN95 doesn't write to the MBR when you run setup from control panel
Add/Remove programs. I speak from experience. It has NEVER happened to me.
However, it ALWAYS rewrites the MBR when you install it or reinstall it using
the SETUP.exe command on the CDROM.
I have System Commander on one computer, Lilo on another, and Disk Manager on
another. they all write to the MBR. System Commander and Lilo get wiped out by
WIN95. You just have to restore the MBR, by whatever means Linux gives you,
and then it will be fine.