Looks like nobody knows how to help me on that? :)

I've done some work and got some results. Please see the following
procedure and make your comments (good/bad/doesn't work at all). This is
draft procedure, so might be some mistakes.

***Moving Legato NetWorker Server based on NT 4 to a UNIX platform.***

Hardware and Software:
Source NetWorker Server: MS WinNT4 Server (machine1)
Legato NetWorker version 6.0 build 513

Target NetWorker Server: SUN Solaris 8
 Legato NetWorker version 6.1.2

NetWorker Client: MS Win XP Pro (machine2)
Legato NetWorker version 6.1.1

Process:

1.Do a full backup of source NT4 server and all its clients. (Optional)

2.Save last Bootstrap info to a tape (run the command on the Source Server).
Be aware of the pool which gets Bootstrap information (usually level 9 is
used when bootstrap saved), you?ll need that pool name on step 5. One
option is marc all the tapes in the library as Read-only, except one you?ll
use for Bootstrap backup. Label the tape to an appropriate pool and start
this command:

savegrp -l full -O

3.Install Legato Networker software on the target server.
Make directory ?/local/nsr?. Create a soft link ?/nsr? under root directory
to ?/local/nsr?. Install path will be ?/nsr?

4.Start NetWorker daemons.

5.Create a Pool on the target server named as pool on the source server
which owns the tape with bootstrap information.

6.Close NetWorker GUI window.

7.Insert the tape with last Bootstrap (from step 2) to a tape device
attached to target server.
* If you are using jukebox device you?ll need to execute the following
command (otherwise you?ll get an error when loading the tape from the GUI)
 nsrjb ?nlv ?S slot ?f device-name

8.Recover the NetWorker source server?s media database and resource files
to the target server using ?mmrecov? command. Enter the device name and the
last save set Id when prompted.  If you don?t know the SSID, you may run
first ?scanner ?B? to find it out.
* Never start mmrecov command from the root directory!

9.Same time you can go to source server and ?zip? server and clients index
files (all files under db6 folder):
C:\tools\legato\nsr\index\machine1\db6\*.*  zip to machine1.zip
C:\tools\legato\nsr\index\machine2\db6\*.* zip to machine2.zip
Send ?zipped? files over FTP to the target server to a temp directory.

10.When ?mmrecov? complete, remove following files from /nsr directory on
the target server:
rm ?C:\tools\legato\nsr\res\nsr.res?
rm ?C:\tools\legato\nsr\res\nsrjb.res?
rm ?C:\tools\legato\nsr\res\nsrla.res?
rm ?C:\tools\legato\nsr\res\rservers?
rm ?C:\tools\legato\nsr\res\servers?

11.Restart NetWorker daemons.

12.Recreate all clients from the source with the same FQDN names on the
target server. Add your account to Remote Access field in the Client setup.
Clients to be created: machine1, machine2

13.Shutdown NetWorker daemons. ?nsr_shutdown?
14.Unzip clients and source server index files to appropriate directory on
the target server (do not just copy over unzipped files, unzip in target
directory). Files from each zip arcive should unzipped to db6 sub-directory:

/local/nsr/index/<CLIENT_NAME>/db6/
Overwrite all files when prompted.

15. Start NetWorker daemons. You may run "nsrck -L 6" and see if
everythings ok.

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