Could you be more clear on the software, what it supposedly does,
and how you expect to use it; then maybe some sense of what the
real issue is, may be more apparent.
A BlueTooth module is usually a hardware component that provides
a wireless product to work with the computer; or in some cases, the
bluetooth may be an accessory or peripheral, or a wireless headphone
or other product (such as cellphones can use.)
If the computer (is this computer related?) has hardware support to
use BlueTooth products and connections, then whatever it is you are
trying to download and use, may work.
There are component BlueTooth wireless modules with a USB plug
on them to add this BT to computers that did not have it built-in.
Some of these modules may require drivers, but usually Mac OS
X has drivers built into the system to support several products.
My iBook G4 has built-in BlueTooth wireless, in addition to 802.11/g
wireless for internet; so it can use a wireless keyboard or other BT
components and link to other products wirelessly. My iMac G4 does
not have a BlueTooth wireless module built-in; it was a factory option.
So, if you could explain what ever it is, you are doing, that may need
to have a BlueTooth module (sometimes called a 'dongle'...) maybe
the pieces of what you are trying to do may fit.
Oh, some newer BlueTooth products may not work with the OS X 10.3
system if they are newer; since Panther is rather dated now. If the item
says it can work with Panther 10.3.9 and later, then it should be ok.
Whatever it is.
+Can you provide a link to the site with information about the product+
+you are looking into, or whatever the software is supposed to do?+
This is really rather odd.
Good luck & happy computing! 🙂