You can do this in your test environment via DBU (or DFU if you use it) 
but I would recommend to take anybody in the test environment to quit and 
use CAS to do this change:
CAS, 
7. Extended Environment Support >> 
4. Maintain Library List
You need to have CAS authority and also *ALLOBJ to do this. 
Peter Vidal 
MAPICS IT Technical Support Team / SR System Analyst
10540 Ridge Rd., Ste 203, New Port Richey, FL 34654-5111
Tel:727-849-9999, x2414 Fax:727-815-3120
http://www.pall.com
"Great ability develops and reveals itself increasingly with every new 
assignment."
Baltasar Gracian
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