MATTsoft Boot Manager - http://www.penguin.cz/~mhi/mbtmgr/ - documentation

4. Installing new operating system

Many commercial operating systems are destructive and installation program removes at least MATTsoft Boot Manager (Ooops, all boot managers ;-), some also other installed operating systems. You should have DOS bootable diskette with MATTsoft Boot Manager. Creating boot disk is described in chapter 2. When MATTsoft Boot Manager is destroyed you can run MBTMGR setup program (MBTMGR.EXE) which will automatically reinstall MBTMGR.

4. Installing new operating system

4.1 Installing MS-DOS, OpenDOS, PC-DOS

4.2 Installing Windows 95/98