I'm no good at programming, but I was able to convert most of these using a batchfile I wrote for use with Hex Editor XVI32.
Basically, I just replaced the first part of each atlantica .dds file with the first bytes of a corresponding size/shape normal .dds file and I can open them all ok.
For example here's the Hex Editor XVI32 script I used for the 512x512 342 kb .dds files:
ADR 0
OVERWRITE 44 44 53 20 7C 00 00 00 07 10 02 00 00 02 00 00 00 02 00 00 00 00 00 00 00 00 00 00 0A 00 00 00
some of the mip maps are messed up, but that's easy to fix.
I copied all the monster dds files into a directory on my c drive called c:\atex\monster, then created a windows batchfile to convert all the dds files:
XVI32.exe JAGWARRIORF3_MAP01.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANF3_MAP01.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANF3_MAP00.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANF2_MAP01.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANF2_MAP00.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANF1_MAP01.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANF1_MAP00.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANB1_MAP01.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe REMODELMANB1_MAP00.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe LEECHESF2_MAP00.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe LEECHESF1_MAP01.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc
XVI32.exe RATMANF2_MAP00.dds /S=C:\ATEX\MONSTER\SCRIPT342.xsc, etc, etc,
Sigh, this is why I should've stayed in school and learned to write a proper program
