Hi all,
Hoping some one has a better idea of what this thing is than I do...

So, recently brought this hybrid kit router (TL_WDR3600) and Hybrid wifi extender (AV500 H5E(EU)V.1.
The router has had the dd-wrt firmware added to it. Which I'm quite happy with.

However it means that the WPS switch has no function on the router other than to hard reset it. Which I only figured out after following the WPS setup instruction. A bit frustrating. But I figure not the end of the world, surely I can set it up manually? Apparently not. After 10+ hours of attempts just to connect to the wifi extender I find out its admin page options are some what limiting. So I can't create a wifi name or password on the extender manually through its admin pages? Seems a little odd...
I already have a 4220 powerline kit with 2 wif plugs and 2 wired plugs. Using the TP-Link PLC Utility I can connect this extender to the already existing powerline adapter network which allows it to share the powerline network and I can use wired connections on the wifi extender adapter, however that still doesn't help with the wifi?
It shows it has it's default wifi service running, however I have no way of connecting to it as it doesn't appear to have a default wifi password card,not that I can find at least???
Its built in admin page has no way of setting the wifi name or password?

I'm surprised it can connect to the powerline network as it is, as I was under the impression that it was just a wifi extender not powerline compatible? Hence the thought of possibly changing the firmware for a 4220 one as it does seem to function in a similar way but with the added functionalities removed? So is that just simplified firmware or is there a hardware difference to?

Is there any other way I can set this extender up manually?

Is there a new firmware I can install on this extender so I can edit the wifi settings manually?

Would it be possible to, say, try installing a 4220 firmware instead?

Also is there a download for the original firmware for this thing? (For the life of me I can't find one...)!

This has been a some what frustrating trip around google, reading the documentation I have, and scanning this website and anything else I can find. There is surprisingly little information I can find about this kit... Any help appreciated.

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Update 1 - So,as an additional, I have tried to connect the H5E hybrid wifi extender to a Gigacube which is supposed to support WPS connections. It gets absolutely nothing... Press the WPS button on the router, press the button on the extender. Wait 2+ mins, etc... The extender just goes back to showing its default wifi name and does not appear to connect to the router or swap WPS information. I am unable to log into the extender through wifi in any way. If I connect to it through the TP-Link Plc software I can link to it but can't change any wifi details, just the default admin password... Nice and all but a bit useless...

Update 2 - Okay - so that didn't work.... refuses the flash files lol.Go figure!

I one step away from just flashing this thing with a wpa4220 default firmware and seeing what happens myself! Worst case scenario at this point is it doesn't work. And seeing as I can't get it to work any way, its only one step away from being put in the bin anyway!