SQL Server Express 2005 installation issue (Vista)

[UNeverNo]

During a Installscript project I install the MSSQL Server 2005 Express with these params:

/qb ADDLOCAL=All INSTANCENAME=AppName DISABLENETWORKPROTOCOLS=0 ADDUSERASADMIN=0 SQLAUTOSTART=1 SECURITYMODE=SQL SAPWD=-.-

This works fine with 2000 and XP, but Vista fails with a message, that the sql server service could not be started. Vista says I should check if I have enough rights to start system services.
If I run the installation exe of sql server from commandline with the same params it installs just fine.

I guess I need to set my project to run only with admin rights, but how do I achieve this?

[UNeverNo]

Is it impossible?

[MarcusM]

In the releases section you might use the flag (I'm translating from the German version so this might not be 100% correct but look for something similar) "required execution level".
Alternatively you could check for admin rights with something like

if !Is(USER_ADMINISTRATOR,"") then
MessageBox(@MSG_NO_ADMINISTRATOR, SEVERE);
abort;
endif;