Make yourself a "mini-mod" set-up, with say "Early CenPac Balao", with a Data folder below that, a UPCData folder below that, and a UPCCampaignData folder below that, just like the game's folder structure. Then copy the game's "CareerStart.upc" and "Flotillas.upc" files into the "Early CenPac Balao" structure, and edit those files. Put the whole folder structure in the MODS folder, and activate it with JSGME. Test it. Cuss yourself for messing something up, exit the game - if it didn't crash - and use JSGME to deactivate your little mod. Edit some more. Lather, rinse, repeat... Just follow the examples of the rest of the boats in the files, and while it looks complex, it really isn't. It's just that one line looks like the next after a while...
