For 688I, it will work fine on XP.
Go here:
http://www.sonalystscombatsims.com/g...downloads.html
Scroll to the bottom of the page. You will see the update patchs for 688I. You can use them if you aren't using the 688I that came as a part of the Naval Combat Pack.
Download the V107 patch for your preferred language and just unzip the file directly nto your 688I folder. Have it overwrite the file when it asks.
Also, under the V107 patch on that download page is the Renderware DLL's for Win2000. Download that and unzip the file directly into your 688I folder, again, overwriting all files.
This will get 688I to run smoothly on XP. I don't know about Vista, but I can confirm that with the above patches, it runs perfect on XP.
