I tried to make one by using a Starry Night import. It got 65 objects imported and then broke SGP in a variety of ways…locking up, crashing, inability to save. I don’t think it is a problem with the text file, but probably bumping up against what SGP was written to do.
If you want to give it a try the text file to import is at: https://www.dropbox.com/s/8mvlj6gxy4rc740/messier%20marathon.txt?dl=0 You could probably split it in half and run it as two sequences.
In SGP under file, select Import Targets, Starry Nights, and point to the text file.
FWIW the text file comes from a spreadsheet with the object name in column A, RA in column L, Dec in column M, and P worth of columns written to the text file.