Ah! Now that's useful... This will make a good reference for weeding out monsters and later removing unused feats. Thanks!
If you'd like to help, right now we're just taking monster files and chopping out everything above CR6; we'll re-add higher ones (and remove problematic lower-level ones, if any) later. You could just grab a "MonstersA-Z" file and start chopping; or look through the SRD monsters and choose a handful of CR7+ monsters that seem appropriate to E6 with little or no modification (remember, PCs are restricted to BAB+6 because they're restricted to 6 levels... but monsters don't have that limitation on BAB from racial HD!

). The single most important thing to remember is that the point of this first "Phase 0" of the project is to keep as close to the existing SRD as possible, with few changes; cutting material is usually preferable to changing material.
You can take a look at the references in post#1 to see what info is being used as the baseline; and the master progress-report lists in
post#2, to see generally what needs to be done (That list is
usually close to correct-- I try to keep it up-to-date-- but also double check the last page or two of the thread to make sure no one's already working on it).
Proofing is pretty simple: Sprinkled throughout the thread you'll see notes in dark green like "
awaiting proofread" or something. If you find one that hasn't been addressed (again, check post#2 or followup posts), basically look over the file, and make a post like:
file: blahblah
status: done (in bright green, so people can see it) (or "awaiting proofread", if you made a lot of changes and want another look)
comments: any changes or comments you made, or a note that all is well.
And if you made changes, attach the new file to your post; or just note the problems and ask someone else to make changes; or something. It might also be helpful to @ mention the person who originally edited the file, so y'all can sort out any discrepancies or differences of opinion should they arise.
If you'd like to make a first round edit, just claim "dibs" by making a post like:
file: blahblah
status: dibs/in progress (in light blue, so people can see it)
comment: usually empty, but you could also make a note of what youre doing if it takes several days, or something.
When you're done, make another post (or update the same post, if no/few other posts have been made since you chose a file), but change the status to "proofread please" (in dark green again, so people can see it). Hopefully, someone will see it, proof it, and either update or 'bless' it; feel free to @ mention me or pm, and I'll take a look if no one else does.
Ugh, that sounds horribly confusing! There are lots of examples upthread of how it works, maybe that will help.
And if you dont want to venture into the mess with the files, just sticking your head in, double-checking the proofed files, making comments and asking quesions, offering opinions when questions go out, or the like is also extremely helpful. You can always post your thoughts, PM me and/or whoever's responsible for a given file, or whatever. It's all pretty informal-- and hopefully the first phase will be done in a couple weeks anyway.
