I just wanted to know if you still include a header on the first page of your chapters, and if you still use Courier 12 in your manuscripts - as shown in your venerable novel manuscript format example template?
Is there a way to set headers to recognize the first page of chapters, and delete headers from these pages, if we wanted to?
To answer your first question, if I didn't still format my book manuscripts that way, I wouldn't still format my sample novel manuscript that way. What you see on that page is what I still do, and what I will continue to do until I see a compelling reason not to.
And speaking of compelling reasons not to, why on earth would you want to eliminate page headers from the first pages of new chapters? For aesthetic reasons? A book manuscript is a functional document. It has a job it needs to do, and part of that job is to have a header at the top of every page. The manuscript is supposed to be a blueprint for the finished product, not to look like the finished product. Just because published books usually don't have headers on the first pages of chapters doesn't mean the same should be true for your manuscript, no matter how weird it looks to you.
You don't know what an editor might do with your manuscript. Even if he receives it electronically, he may print it out before he reads it, in which case those page headers will be important when two manuscripts accidentally get knocked off his desk together.
Now, to answer your actual second question, yes, there is a way to remove the headers from specific pages, but in Microsoft Word it's hideously complicated. (You have to put invisible section breaks at the beginning and end of the page, and then remove the header from the section containing that page.) In WordPerfect it's much easier: you simply put a Suppress Header code at the top of the page, which is one of the many reasons I still use it.
But for the love of God, don't do it. That is all.