Hi BusyElf, the inf setup and all other microsoft setup (like Windows Installer) do not support subdirectory inside cab archive, but it supports anything else so you do not need to do so that is not the most efficient and useful mod, so for this reason Microsoft does not use it, the alternatives are many (I do not know if nLite\RVMi support them I think not, but the DX WinNT6.x True Integrator supports all), so in INF SourceDisksNames Section and in INF SourceDisksFiles Section so Mod 1 (nLite\RVMi support it) Mod 2 Mod 3 in poor words with Inf Setup you can do every everything, and even perfectly and safe, in the end is a Microsoft thing ehhhh anyway see also how WinRAR True AddOn install the theme from Entries.ini, that an easy way, but not as useful as INF SourceDisksFiles because INF SourceDisksFiles check recent\version file ect ect ahhh in x64 Setup for x32 files use DirId 16425 (16425 = %SystemRoot%\system32 ;OR %SystemRoot%\SysWOW64 in X64), as i said before inside all True AddOns find all possible examples Ciao.