Actually, I don't think they have a Haynes manual for the 93+ Mazda MX6. if anything they have it for an MX3 which might be a little different. The one that I have is for the Mazda MX6/626 - Ford Probe, and has a pic of a PGT in the front.
Anyway, here are my suggestions.
1. Give yourself a lot of time. Upon first removing the intake, it will take you about 3-5 hours for the removal, maybe less
2. Clearly label each and every hose that you remove. I used paint to label each hose and it's proper connector. Trust me, i think there are somewhere in the neighborhood of lke 17+ hoses.
3. The infamous hidden bolt. OK, I'm sure everyone who's removed their intake has come accross this. The thing is... after you have removed and unbolted every visible bolt, you'll find that you still cannot remove the manifold. What you have to do is reach in towards the back of the manifold, underneath the TB linkage and VRIS valves, next to the firewall and feel around... After a while, you'll find one bolt that you cannot see. you have to feel around and remove that bolt before th emanifold can come out. Good thing is that you don't NEED that bolt when you're putting it back together again. (That bolt took me so long to find and remove that once I got it out, I chucked it halfway down my block)
Other than that, it just takes time and patience. if I had to do it agin now, i could probably get it out in like 30-45 minutes. It's rather simple, just a matter of labeling everything before removing them and finding the bolts that keep it in place.