Wait, I should verify if "Mighty to Save" is a specific album. Let me check. Looking up Hillsong Worship albums, I see they have an album titled "Mighty to Save" released in 2009. The tracks include "Mighty to Save," "In Christ Alone," "Blessed Be Your Name," etc. That aligns with the typical Hillsong Worship repertoire. The 2009 release included a live recording and some studio tracks. The ZIP file being exclusive might have been a limited release, possibly a compilation or live recording available only through their site.