FreeBSD/i386 Username Password Problems

Well on my other computer my Harddrive got Fried, so i took another HD from a random computer in my basement, i put it in and it has, of course, FreeBSD. It gets through all of its stuff and come to stuff that looks like this

FreeBSD/i386 (some long server name) (ttyv0)

Login:

Is there a way i can get on this harddrive? way to get another User or find out any old ones? if telling you the Server name or w/e helps please let me know.

Thank You

You can boot it in single user mode and change the root password to anything you like. Here's how to do it:

1. For older freebsd systems, when booting up, it should give you a message to press Enter to boot /kernel or hit any key within 5 seconds (or words to that effect). Instead of typing Enter, type any other key and then type boot -s and then press enter. This will boot the kernel up in single user mode.

In newer versions of freebsd, it should give you a "Welcome to FreeBSD" message" followed by a number of boot options. Hit Space here and then select option 4 (boot in single user mode) and hit enter.

2. You will then see a prompt like this:
Enter full pathname of shell or RETURN for /bin/sh:
Hit enter here and you'll be presented with a shell.

3. At the prompt, type mount -a to mount everything.

4. Type passwd and change the root password to something you choose. If you want to change a user's password as well, you can type passwd name_of_user to change any user's password.

5. Type exit to reboot in multi-user mode.

Now you should be able to login as root with the password you chose.