You most likely paste the whole character data into the wrong bytes. CaS slots are at "00000000 01000000 000B0000" (keyword 000B0000).
https://www.youtube.com/watch?v=US0WeQb-tNQ
Palettes are Colors lol, your best bet to changing the palette for a splice is making a placeholder 1p/2p from Creation to copy all 8 colors from offset 330-370.
They actually are at 2:03, *cough* offset 330. @Palettes
https://www.youtube.com/watch?v=US0WeQb-tNQ
If you mean just CaS palettes for equipment, they're already documented in SCVDRESSUP.
Palettes are mention in the quick video, and 1p/2p parts don't work exactly the same like CaS parts. The Breakable parts (01) WON'T APPEAR without "00".
http://www.youtube.com/watch?v=US0WeQb-tNQ
Just place two 1p/2p bytes like how you would place CaS equipment.
for example: 00XYY000 00 for the perma half and 00XYY001 01 for the second "breakable" half.