Dopod 838 Pro Confusion

Hi guyz,
Hi have reciently purchased a Dopod838 Pro and am waiting for it to arrive Reciently I have been looking around the net and have found several things confusing about this model of phone, especially when trying to get the correct firmware for this model of pda. I want to post this thread to try and clear some of the confusion for people out there like myself as there are still a few things that are unclear to me.

First thing I have found confusing is: The model phone itself.
I have looked around on the internet and as far as I can tell, the i-mate jasjam,
HTC TyTN, and Dopod 838 pro are the same physical device, with the same specs and internal components, manufactured by HTC and rebadged and packaged(?). The difference between these models is the software package it comes installed with. Is this true?

Secondly I find the operating system names confusing when looking for software, as this is my first pda style phone.
My device has Windows Mobile 5.0 installed, which seems simple enough. But when looking for software sometimes you are offered Windows mobile 5 (WM5), Pocket PC, or Windows CE. Which are compatible? Which software will work on my phone? Obviously if the site says WM5 I’m all good, but often it will specify one of the others. I am aware Palm is totally different, but thought WM5 was built on Windows CE? I have also read “Windows Mobile 5 Pocket PC” as the os name which adds to the confusion as well.

Thirdly I believe my device is considered a PDA, a SmartPhone and a Pocket PC, is this how it is? Some sites have listings stating only smartphones ,pocket pcs, or pda’s like this site, and it leaves me wondering which downloads are suitable and what is the Dopod 838 Pro is actually considered to be.
Thanks in advanced to any wisdom given