If you need any help with restoring the hi-res images, tell me. I'm a professional digital image restorer and recently released an e-book of restored 1970s concert/tour programmes.
Gimp's ok, but it just doesn't have the functionality of photoshop.
For anyone with the books, please scan at least 300dpi
Audio-wise, I'd be getting uncompressed rips (mp3 is no good at all, especially for preservation), and release as FLAC.
image restoration: