BAIN works fine, most of the mod functions work fine, the savegame functions work fine; the only feature I would suspect not to work exactly right at this point would be Bashed Patch, but even that might work for GMST edits if you swap the masters.
Well what I'm concerned over is if I set the save game profiles to one profile in the normal Oblivion Wrye Bash then if I set it to something else in the Nehrim version then ... Yeah probably they would just each switch it accordingly.
I might have to try this as it would make porting BAIN packages easier.
Just to let you know I had already made a basp patch for Nehrim - with only camera tweaks and clothing (rings visible, etc) and it works (better than the camera mod for nehrim). I just then renamed the master to Nehrim.esm and moved it to the Nehrim data folder.
... I'm wondering if that would be possible to do with a blank oblivion.esm?
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[edit] So I tired by renaming and redating the nehrim.esm to oblivion.esm and it started and it recognizes all the save game profiles that regular Wrye Bash sees.
Bashing a patch (with clothing, camera, and arrow tweaks only) of course makes the patch dependent on the Oblivion.esm - so you still needed to change master. In fact it makes it sloppier to do that because it actually makes the patch dependent on Nehrim.esm too so renaming master is not good for that.
lets see ... tried deactivating all mods except the falsily named Oblivion.esm and bashing then renamed the master to Nehrim.esm - and no it still wanted Oblivion.esm.
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[edit 2] and using the blank esp made into a master called Oblivion.esm means that that esm will have Oblivion.esm as a master.
So other than BAIN and save game profiles - pretty much not helpful for bashing.
... and just to let you all know I found the camera death tweak for bash did not work with Nehrim.
... and as a tip for making bash tweaks for Nehrim I just keep a copy of Nehrim in the hidden in the regular wrye bash so that when I change a mod to work (hopefully) with nehrim I just unhide it use Gecko then rehide it.