Here's my way.
[Version]
Signature=$Windows NT$
[DefaultInstall]
AddReg=InstallTU
[Stage2]
DelReg=Removes***
AddReg=TUSettings
DelFiles=Shortcuts
DelFiles=1Klick
[InstallTU]
HKLM,"%RunOnce%","tusetup1",,"%01%\tusetup.msi /qn ALLUSERS=1"
HKLM,"%RunOnce%","tusetup2",,"%10%\system32\rundll32 setupapi,InstallHinfSection Stage2 128 %01%\tusetup.inf"
[TUSettings]
HKCU,"SOFTWARE\TuneUp\Utilities\4.0","Company",,""
HKCU,"SOFTWARE\TuneUp\Utilities\4.0","UserName",,""
HKCU,"SOFTWARE\TuneUp\Utilities\4.0","RegCode",,""
HCU,".DEFAULT\SOFTWARE\TuneUp\Utilities\4.0","Company",,""
HCU,".DEFAULT\SOFTWARE\TuneUp\Utilities\4.0","UserName",,""
HCU,".DEFAULT\SOFTWARE\TuneUp\Utilities\4.0","RegCode",,""
[Removes***]
HKCR,"CLSID\{20D04FE0-3AEA-1069-A2D8-08002B30309D}\shell\TuneUp Utilities"
HKCR,"CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\Shell\TuneUp Undelete"
HKCR,"*\shellex\ContextMenuHandlers\TuneUp Shredder"
HKCR,"Directory\shellex\ContextMenuHandlers\TuneUp Shredder"
HKCU,"Software\Microsoft\Windows\CurrentVersion\Run","TuneUp MemOptimizer"
[Shortcuts]
TuneUp Utilities 2004.lnk
1-Klick-Wartung.lnk
[1Klick]
1-Klick-Wartung.job
[DestinationDirs]
Shortcuts=16409
1Klick=10,Tasks
[Strings]
RunOnce = "SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce"
RunOnceEx = "SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx"