Run Program in T-39

[WInXpLover]

hi,guys i've small question i saw in personal windows for someone when the T-39 Board comes i found that a program opened and when i searched in this sttaf i found that code

[GuiUnattended]
DetachedProgram="%systemdrive%\Windows\xxxx.exe"

but when i went to winnt.sif file i didn't find that code so how can i do this without useing winnt.sif

and thanx for reading

[MgmTest]

me too.