I know of a few websites that make this foolproof...I can't remember all of them but i've done this many times before...only example i can give is Dell for sure... here's how they can make it work, and i swear FOOLPROOF, I've worked with idiots who know nothing of page navigation and have managed this...
-Enter Serial no into box (there is an image/instructions showing you how)
- If correct, page directs you to DL page with instructions on how to install or will email
-If a non valid serial no is entered, you go back, or rather the page takes you back and tells you what you've done wrong...try again...
oh, and if you can't work out that system, then you are worse than my mother =/ who can't even change the TV channel by punching a number into the TV remote...
This makes it easy when dealing with different devices =D
Hell, The Xbox 360 has many~ different hardware revisions, same for the PS3...and yup...updates can kill some of them too =O
Also, the waiting isn't too bad, at least the device is usable...
Waiting for something you may never get however....
Edit 2 - also, yeah, i check the forums etc and the bookeen website to check for the update, i updated my device to 1.2 and experienced huge improvements, i don't read books, i've always read manga
Folder support is an epic hope, currently my flow to make things readible is extract (rename if needed) resize and convert to PDF which works nicely...but the renaming sometimes can be hectic ;_; even .zip support would be nice