I assume VB.NET has some kind of documentation feature like C# (maybe?). In C# you can add /// comments. If you add them above a function, it automatically scans the parameters and creates little sections for them in your comments. Later, you can build documentation from those comments.
Why am I mentioning this? Hopefully just about every function you have has at least a one line comment to describe its general purpose and intended use. If so, those comment blocks are a great way to see where one function ends and another begins.
You can also set up Regions in code, which are collapsable areas of code.
I know I didnt answer your question, but... I used VB for years and loved the function separater and loved it. I missed it for awhile but didnt find a way to get it back (not in VS 1.0). But after about a week, I didnt miss it anymore. It might be back in VS 1.1 but I havent looked.
-nerseus