Soo im searching around for mod/editor for adding SETA early in the game.. but i didn't found any..
then i just try to edit my save file..
back up your save file first!! incase something go wrong..
Open your save file..like quicksave.xml(use 7zip,then notepad++)..
1.search for something like <ware ware="inv_scrapmetal" amount="310"/> (amount is amount in your inv when you save)
2.add this line before </inventory> or just under the scrapmetal line..
<ware ware="inv_damagedsingularityengine" amount="9"/>
<ware ware="inv_fluxcapacitor" amount="9"/>
<ware ware="inv_programmablefieldarray" amount="9"/>
<ware ware="inv_interfaceunit" amount="9"/>
3.save the savefile.xml (update the .xml.gz in the 7zip)..
4.load the game..
5.shift+I..craft SETA..Profit..