>I'm trying something like Kelvin and have created a similar
>database file "idea.txt". Now the Fatty 1 Admin has a place
>to specify the database path.
>
>But where do I actually upload the "idea.txt" file in my
>server before specifying the path for the database?

You can upload it anywhere you want, which is why you need to specify a path to the text file.

However, to make things easier you can upload it to the Fatty folder, in the same folder as fatbomb.cgi. If you do this you only need to enter the file name as the path:
idea.text

If it is located somewhere else, you'll need to use the dashes and dots:
../idea.txt
/folder/anotherfolder/idea.txt

I suggest you just upload it to the same folder that contains fatbomb.cgi.

>And as far as giving different weight to different URLs in
>the database is a Fatty 2.0 feature right?

That's correct.