I have loosed the root password

I heve loosed the root password in a server QNX ver. 4.25, what may i do?
I dont have either the install CD.
is it possible to reinstall the server without erase the configuration and software within the server? to get another password.
please answer as soon as possible.
Thank you.
My mail:

You have to boot from a CD and floppy, then edit the file /etc/passwd and remove the “x” found on the line where the user root is defined. You could also move the HD onto another QNX4 machine and install it as a slave HD.

It should be possible to reinstall the server without erasing stuff, but its rather risky and you need to know what you are doing. I dont recommend it.