User blog comment:WonderfulAsia/Hetalia Sheet Music/@comment-96.227.90.253-20110220230619

I tried downloading "let's boil hot water". All the folder contains is .bmp files. When I open the files, I get a notepad document with a bunch of "y's" in it. This basically means I don't have the software needed to open the files. Yet I have PDFs. What software do I need to open the sheet music?