Mapping is not hard. Have you tried it? You will not break anything or destroy anything.
You put the download files in a separate folder.
You change xlights setup to that folder.
Open the sequence and save it.
Go to tools export models, that will create a ?.csv file
Open the csv file in excel or some other spreadsheet program and save it as a spreadsheet.
All the downloaded sequence models are listed in the first column. Insert a column to the right (as column 2)
Print it out if that helps. I only print the first couple of columns to save paper as the rest of the data is useless for mapping purposes
now play the sequence several times and list your matching model name in the new column
Close the sequence
change setup back to your own show folder
start a new sequence with the music of the song and all your models as if creating one from scratch
go to import, import effects
point to the downloaded sequence folder and the seq
you get a table with all of the downloaded models on the right and all of your models on the left
drag the models from the right to the left
click on save mapping - very important
click on ok
all done for the first iteration
save your sequence, play and see how it looks
now if needed go back and do the import again, but first load the mapping file you saved, by default it should be in the folder of the downloaded seq
make any changes in model mapping, SAVE it again. I usually save it to the same name or I get confused as to which mapping file I like, but it is possible to create several different maps and it can change the way the result looks
repeat as necessary.