Wrye Bash handles invalidation. Besides which I thought that was only necessary for textures.
If VersionLessThan 1.1.2 Message "This mod must be installed by OBMM version 1.1.2 or later to prevent script errors." FatalErrorEndIfIfNot OblivionNewerThan 1.2.415.0 Message "This mod requires Oblivion 1.2.416 or higher. Please download and install the official patch." FatalErrorEndIfDontInstallAnyPluginsDontInstallAnyDataFilesCopyDataFolder "00 Core Resources\\Meshes" "Meshes" TrueCopyDataFolder "00 Core Resources\\Textures" "Textures" TrueCopyPlugin "00 Core Resources\\Open Cities Resources.esm" "Open Cities Resources.esm"If DialogYesNo "Do you want all Open Cities to be install?" "Open Cities - Full Merged" SelectWithDescriptions "Open Cities - Full Merged" "Full with 'Bravil Blood & Mud' and 'Leyawiin Reborn'" "You must have 'Bravil Blood & Mud' installed to select this option and you must have chosen to install 'Leyawiin Reborn' data." "Full with 'Bravil Blood & Mud' only" "Only 'Bravil Blood & Mud' is required." "Full with 'Leyawiin Reborn' only" "Only Leyawiin Reborn Data is required." "Full only" "Basic" Case Full with 'Bravil Blood & Mud' and 'Leyawiin Reborn' CopyPlugin "15 Full Merged\\Open Cities Full + Bravil Blood & Mud + Leyawiin Reborn.esp" "Open Cities Full + Bravil Blood & Mud + Leyawiin Reborn.esp" Break Case Full with 'Bravil Blood & Mud' only CopyPlugin "15 Full Merged\\Open Cities Full + Bravil Blood & Mud.esp" "Open Cities Full + Bravil Blood & Mud.esp" Break Case Full with 'Leyawiin Reborn' only CopyPlugin "15 Full Merged\\Open Cities Full + Leyawiin Reborn.esp" "Open Cities Full + Leyawiin Reborn.esp" Break Case Full only CopyPlugin "15 Full Merged\\Open Cities Full.esp" "Open Cities Full.esp" Break EndSelect Else SelectMany "Open Cities - Individual Cities" "Anvil" "Bruma" "Chedynhal" "Chorrol" "Skingrad" Case Anvil CopyPlugin "10 Individual Cities\\Open Cities Anvil.esp" "Open Cities Anvil.esp" Break Case Bruma CopyPlugin "10 Individual Cities\\Open Cities Bruma.esp" "Open Cities Bruma.esp" Break Case Chedynhal CopyPlugin "10 Individual Cities\\Open Cities Cheydinhal.esp" "Open Cities Cheydinhal.esp" Break Case Chorrol CopyPlugin "10 Individual Cities\\Open Cities Chorrol.esp" "Open Cities Chorrol.esp" Break Case Skingrad CopyPlugin "10 Individual Cities\\Open Cities Skingrad.esp" "Open Cities Skingrad.esp" Break EndSelect SelectWithDescriptions "Bravil - A choice to make" "Standard Vanilla Bravil" "Basic" "Bravil Blood & Mud layout" "Requires 'Bravil Blood & Mud' Mod." "None" "Does not install Open Bravil" Case Standard Vanilla Bravil CopyPlugin "11 Bravil\\Open Cities Bravil.esp" "Open Cities Bravil.esp" Break CaseBravil Blood & Mud layout CopyPlugin "11 Bravil\\Open Cities Bravil Blood&Mud.esp" "Open Cities Bravil Blood&Mud.esp" Break Case None Break EndSelect SelectWithDescriptions "Leyawiin - Another choice" "Standard Vanilla Leyawiin" "Basic" "Leyawiin Reborn layout" "Requires Leyawiin Reborn Data" "None" "Does not install Open Leyawiin" Case Standard Vanilla Leyawiin CopyPlugin "12 Leyawiin\\Open Cities Leyawiin.esp" "Open Cities Leyawiin.esp" CopyPlugin "20 Road Record\\Open Cities Road Record.esp" "Open Cities Road Record.esp" Break Case Leyawiin Reborn layout CopyPlugin "12 Leyawiin\\Open Cities Leyawiin Reborn.esp" "Open Cities Leyawiin Reborn.esp" CopyPlugin "20 Road Record\\Open Cities LR Road Record.esp" "Open Cities LR Road Record.esp" Break Case None CopyPlugin "20 Road Record\\Open Cities Road Record.esp" "Open Cities Road Record.esp" Break EndSelectEndIfIf DialogYesNo "The Imperial City cannot be opened, but do you, at least, want the Prison and Arcane University opened as well (Outer Districts)?" "Open Cities - Outer Districts" CopyDataFolder "30 Outter Districts\\Meshes" "Meshes" True CopyPlugin "30 Outter Districts\\Open Cities Outer Districts.esp" "Open Cities Outer Districts.esp" ElseEndIfIf DialogYesNo "If you have J.Sera's Bartholm, do you want the open version?" "Open Cities - Bartholm" CopyPlugin "40 Bartholm\\Open Cities Bartholm.esp" "Open Cities Bartholm.esp" ElseEndIfIf DialogYesNo "Do you want Crucible and Bliss (SI) turned into open cities?" "Open Cities - New Sheoth" CopyDataFolder "50 New Sheoth\\Meshes" "Meshes" True CopyPlugin "50 New Sheoth\\Open Cities New Sheoth.esp" "Open Cities New Sheoth.esp" ElseEndIfIf DialogYesNo "Did you install any Leyawiin Reborn layout?" "Open Cities - Leyawiin Reborn" CopyDataFolder "01 Leyawiin Reborn Resources\\Meshes" "Meshes" True CopyDataFolder "01 Leyawiin Reborn Resources\\Textures" "Textures" True ElseEndIfMessage "Many compatibility patches exist, make sure you check them out."IfNot DialogYesNo "Open Cities is now ready for installation.%NewLine%%NewLine%Do you want to proceed (select 'No' to cancel installation)?" "Open Cities" FatalError EndIf