It's fully functional, but it includes a registration window.
The OSL2000 boot manager is a standard tool for programmers or system administrators that usually works with multiple operating systems.
This program gives you the possibility to start your PC with a variety of free and completely independent operating systems, works in every case, so you can not use any other option otherwise.
After installing, the OSL2000 boot manager will ask you to restart the PC to do the job. From now on, every time you start the computer, the OSL2000 boot manager will show you a dialog box where you have to select the operating system that you will work in each session.
We have to suggest that the OSL2000 boot manager is only an assistant to start the system. So if you want to work with multiple operating systems you need to install it on your hard disk or any other removable device.