Got a bit further with iPrint Client Manager

But not very far.
If I log in on workstation with admin rights printers are delivered OK
If it is User or Power User I get

in ipptrace

[NIPPLIB] - IppPrintInstaller - LoadLibrary(NIPPCL32.DLL) failed 126
[SETUPIPP] - RightsToInstall - OpenSCManager failed 5
[SETUPIPP] - Access is denied.

in icmlog

Novell iPrint Client - iCM Desktop Client/Printer Management Log
Tree = TREE
User = SCR-13-5NBSW3J-00:1E:C9:5D:15:49.SCR.Workstations.XXXXXXX
Date = 09-09-2008 12:56

Container - SCR.Workstations.XXXXXX
Client Configuration - Not enabled
Printer Configuration - Enabled
Show Results - Disabled
Allow Only Specified Printers - Disabled
Add (Reprographics-Colour.NDPSPrinters.SPGS.UK) -
ipp://printserver.xxxxx.xxxxx/ipp/Reprographics-Colour (Failed to Install)
[Cannot perform this operation on this built-in special user.
]
Add (SCR-Colour-HP4550.NDPSPrinters.SPGS.UK) -
ipp://printserver.xxxxx.xxxxx/ipp/SCR-Colour-HP4550 (Failed to Install)
[Cannot perform this operation on this built-in special user.
]
Add Default (SCR-Mono-HPLJ4350.NDPSPrinters.SPGS.UK) -
ipp://printserver.xxxxx.xxxxx/ipp/SCR-Mono-HPLJ4350 (Failed to Install)
[Cannot perform this operation on this built-in special user.
]