DEP prevents silent install

[islander_810]

The DEP prevents silent install of firefox, pidgin and ie7pro. Is there any way to avoid the prompts, as the whole point of making an unattended cd is lost. In the unattended section of nLite, i choose Data Execution Prevention = Always Off. This is the line from the winnt.sif file (OSLoadOptionsVar="/noexecute=alwaysoff"). Still it prompts. Can someone pls help me? thx...