Tes4Mod:Vs. Morrowind

Outdated Tech: This article was never fully developed, and is now rather moot, since most new modders do not have Morrowind modding experience.

Are you an experienced Morrowind modder, making the move to Oblivion? This page is for you! Probably the best format is an FAQ...

[edit] General

Limited Companions: Oblivion seems to have less support for companions. E.g., there is no companion variable to flag Companion Share. But you can still dress companions by altering their inventory.
Internal Form ID references and plugin dependency: It looks like new ESM/ESP format uses 4-byte Form ID (using TES CS terminology) to store object references (e.g. SCRI field in many records). While this is more efficient, it looks like it has an unfortunate side effect that one (ESP) plugin cannot be dependent and reference objects from another (ESP) plugin - it can only reference objects defined in (ESM) master files. For more info, see FormId and Mod Integration.

Voiced Dialog: Oblivion adds voices for dialog. Cool for the player, hell for the modder who feels obliged to meet that standard.

Blocks Instead of Tests: Tes3 used functions and variables to trigger situation specific code. Tes4 uses blocks of code instead. This resulting script should be more efficient, but you'll need to get used to the different approach.
No While Loop: There's no while loop in Oblivion scripting. And that was the only looping control structure in Morrowind.