These extensive collections of monsters are enumerated as "Versions". They contain entries derived from two principle sources - conversions of existing, "old" monsters (many from commercially published products); and newly created material.
Version 003 was published as a single massive document.
Version 004 (published in two parts) includes everything in Version 003, expanded with new materials.
Version 005 featured a vastly reduced content due to concerns of Open Game License compliance (all conversions of existing, commercial materials were removed).