Game line names across languages; RSubtitle; editor in three columns

docs/formats/subtitles.md

@@ -13,6 +13,13 @@ the UE3 packages (`upk.md`), holding the subtitle text of all 11 languages. acki
 - Strings are stored as cp1252 (positive FString length) or UTF-16 (negative length): RUS, POL, JPN, KOR
   and some INT/ESN/FRA/DEU strings are UTF-16.
 
+## Scripted subtitles (`RSubtitle`)
+41 more subtitles (radio and encryption-card lines) are `RSubtitle` objects in `Startup.upk`: the same layout,
+with the per-language array named `ArraySubtitles` and a float (duration) at `0x2C` instead of a speech
+reference. `RSubtitleLookup` (`Startup.upk`, `Lookups`) is an array of `{int key @0, object @4}`, key =
+FNV-1 of the speech line name without `Speech_` (e.g. `CH_ZERO_CH0_ENCRYPTION_CARD2_01`), which links each
+`RSubtitle` exactly to its line. ackit reads and writes both kinds the same way.
+
 ## Object layout (compact tagged properties)
 The export data is a list of properties `u16 type, u16 field offset, value`, ended by `u16 0`. Types seen:
 `0x10` object reference (i32 export/import index), `0x0D` FString, `0x09` struct/array (name i32+i32 = struct