I think you've asked for help with this problem in another forum area, and I believe I may have responded with information about file synchronising software.
Forgive me, but I can't help the feeling that you're over-complicating this process. That may be because I'm not fully understanding the problem.
Why can't you just create a master file on your host PC and get some readily available software to synchronise the updates to the copies on the other PCs every five minutes or so? That way there's no need to get involved with HTML at all - you could do it easily in an Excel workbook.
This doesn't really belong here in the Web design forum, so I'm going to move it to the Tech helproom.