Install SQL 2008 silent without Administrator previleges

Hi,

I'm trying to install SQL 2008 R2 remotely without the Administrator (via cygwin)

The user root is in the administrator group, however the install throws all sorts of errors at execution

setup.exe /CONFIGURATIONFILE=configurationfile.ini

Error

Running Action: MsiTimingAction
----------------------------------------------------------------------
Running Action: Install_WatsonX64_Cpu64_Action
Sco: Attempting to create base registry key HKEY_LOCAL_MACHINE, machine 
Sco: Attempting to open registry subkey 
Sco: Attempting to open registry subkey SOFTWARE\Microsoft\VisualStudio\9.0
Target package: "C:\sql\x64\redist\watson\dw20sharedamd64.msi"
InstallPackage: MsiInstallProduct returned the result code 1622.
Watson Bucket 1 
 Original Parameter Values 

Parameter 0 : 10.50.1600.1 

Parameter 2 : dw20sharedamd64.msi 

Parameter 3 : 0x162A16FE 

Parameter 4 : 0x1622 

Parameter 5 : Install_WatsonX64 


 Final Parameter Values 

Parameter 0 : 10.50.1600.1 

Parameter 2 : dw20sharedamd64.msi 

Parameter 3 : 0x162A16FE 

Parameter 4 : 0x1622 

Parameter 5 : Install_WatsonX64 

Sco: Attempting to write hklm registry key SOFTWARE\Microsoft\Microsoft SQL Server to file C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20121123_133628\Registry_SOFTWARE_Microsoft_Microsoft SQL Server.reg_

Any ideas how I can get around this?

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