Also note that the MiniSAC catalog which ACP uses can be added-to. The addition kit is available on the ASCOM web site.

However, to access a different catalog, I would recommend using a #tag and UserActions

#tag G2V=xxxxx

then back-plug the Target object. I haven't tried it but I think as a TargetStart action you can back-plug the name and coordinates, then the file name calculations will use the new name. The actual target name could be anything,. Or it may be necessary to make the target name the same as the object name in the #tag. Or you could choose to keep the flexibility of naming the target anything, and using the #tag just to look up coordinates by the catalog name. It sounds crazy but you could use Excel as the database and look the object up directly from your spreadsheet via scripting to the Office/Excel API!