I'm not a lawyer, but to my untrained eye what you've done here is just repost the content, and haven't made it a separate work. What you should probably do is:
That seems like a minimum you'd need to do, and I can't guarantee that that would be enough.
- Go over the files and make sure there's nothing in them that the original publisher has called out as product identity. For example, I understand that there's a spell in the 3.5e SRD that uses umber hulk blood as a component, and you probably want to get rid of that.
- Write your own legal statement with declarations of product identity and open game content. Look at the legal.rtf file in the 3.5e SRD for an example. You should almost certainly not copy their declaration verbatim, because in doing so you'd declare that the terms Dungeons & Dragons, Wizards of the Coast, Forgotten Realms, etc. are your product identity, and that seems like a big no-no.
- Update section 15 of the OGL in each of your publications.
(edit: removed after seeing there was express permission to redistribute that file)