TOS 39 through 48 are from Marvel's Comic Book Library Vol. 1 - CD ROM, 51 - 58 are from Marvel Masterworks, Vol. 45. 59-68 are from the CD-ROM (Cap. America's 1st ten issues). The rest of the Iron Man covers are from my own individual issues or Iron Man: The Complete Collection of comics on DVD up through 2000 or from where I can find a copy.
The Avenger first ten issues are from the CD-ROM as well.
During Vol 4, the Inevitable came out in 2006. After Iron Man Vol 4, then The Invincible Iron Man Vol 1 was next, then Iron Man Vol 5