Assuming you want to switch out the models entirely and play on the Dynaverse
If you're using OP+ (as an example)
Find the models in the directory (in this case OPPLUS/models/fbcg and OPPLUS/models/fbcf/fbcf.mod )
Delete whatver's in that folder (but not the folder)
Paste the model you want in the folder
Rename the *.mod and *_brk.mod files from your "new" model to fbcg.mod and fbcg_brk.mod
(Example)
I decide I like the fbcg model and hate the fbcf model, wanted to use the same model for both
1) go to the OPPLUS/models/fbcf directory and delete everything (save it of course if you want)
2) go to the OPPLUS/models/fbcg folder, copy everything and paste it into the OPPLUS/models/fbcf folder
3) in the OPPLUS/models/fbcf folder I now need to rename 2 files
fbcg.mod is renamed fbcf.mod and fbcg_brk.mod is renamed fbcf_brk.mod
Now the model for the fbcf and fbcg are the same, and I haven't done anything to the shiplist files so I can still log onto the D2