Easiest way is to take another ship
Say the NKSCS_Taihosan from SH4 released somewhere in these forums
Rename that folder AND all its contents as the NKSQ folder is names INCLUDING the classname in the cfg
Make yourself a JSGME package and enable
Now all Coastal mercs you see will be different
Always remember to try use a similar sized ship or docked ones may have a problem
Same or faster speed too - dont use a slower one or will CTD when the game tries to render the ship at a speed higher that it can go
Try this
http://www.mediafire.com/?9tymmnndd0o
JSGME ready
Will give you an idea of what to do
Replaces the NKSQ with the ship named above
Apologies to whoever converted the NKSCS_Taihosan from SH4
Cant remember where this one came from

- probably Trainer or Molke