Magic Box Imp on 128-bit WEP secured network

This is maybe old hat for some of you: Set up one of these today and its (a really gorgeous bit of) consumerkit which does this:
https://www.reciva.com/index.php?option=com_content&task=view&id=7&Itemid=56
RTFM'd twice without finding out how to enter data - OK I'm a Luddite and I didn't know how to operate the shuttle wheel thingy on an iPod, so I had to work it out - the clients were wanting it done, and of course hadn't fore-warned me (they're wealthy so its not an issue for them {and it helps fund my probono stuff}:)!
And, oh yeah, mercy, halley-loo-jah, I'd never before assigned a fixed IP on an oldish Netgear(DG824M) for an InternetRadioDevice, nor defined Services from which to create Rules for the Firewall. (Last did this sort of thing in the CiscoLab, first time out in the field.) Don't ask why, but I didn't try googling for any search string at the time (would've done, and asked around too, had I been fore-warned of course). Anyway, had the thing up and running for them in less than 3 hours.
It looks like this:
"Great Reasons to have BT Internet Radio:
* Enjoy access to over five thousand radio stations from around the world.
* Enjoy access to music stored on your computer from different rooms in your house.
* Enjoy great Stereo sound quality.
* There’s no need to boot up the PC or install any software, enjoy a simple to use set up with easy access to the music you like – it is portable, stylish and wireless.
* Never miss your favourite radio programme again with on-demand/repeat content.
Features of the BT Internet Radio:
* Excellent sound quality through integrated full range stereo speakers.
* Easy to set up and simple to use
* Wireless, portable and stylish for in home use.
* Alarm Clock
* Auxillary 3.5mm Stereo output socket for headphone use
* 12 Station presets for easy access to your 12 most favourite radio stations.
* Supporting Real Audio formats for accessing BBC internet radio stations.
* Compatible with PC and Mac audio play lists and Media player software.
* Clear Two line information display
What do you need to use the BT Internet Radio:
* A broadband internet connection.
* A wireless router.
* A mains power supply (provided).
* If your wireless home network is configured to use WEP or WPA data encryption then you need to know the code so that your BT Internet radio can communicate with the network."

BUT, {caveat: i_was_out_on_learn_as_you_earn}, on closer inspection:
Aside from the the ridiculous amount of time it took to key in the 128BIt Hex password numerous times (Configuration is a little like snakes and ladders) I wasn't able to find any means by which to save changes step by step, AND in fact my suspicion is that if you unplug the thing and re-locate it, it loses its config and you have to start again {[{[85 year old client refers to email instructions from my good self, steps through each of the hoops in turn, goes straight back to Go a number of times, calls me on the telephone at which point I-flat-refuse-to-even-attempt-to-Try_To_Talk_Through-over-the-landline}]}]).
Client is calling their busy helpline tomorrow to try to establish whether in fact the configuration can be saved at all, and whether perhaps my suspicion outlined above is groundless.