Complex sentence: They had the opportunity to open for Vince Neil and Blackfoot, they also made a side stage appearance at Alltel pavilion opening for Three Doors Down, Shooter Jennings, and lynyrd skynyrd.
Split into simpler sentences: They had the opportunity to open for Vince Neil and Blackfoot. They also made a side stage appearance at Alltel pavilion, opening for Three Doors Down, Shooter Jennings, and Lynyrd Skynyrd.