Are there any up to date guides on setting up wireless on a 2920n using the new 3.6.3 firmware?

In particular, I'm setting up one SSID for now and want to use WPA2/PSK - the 2920 gives me a pre shared key - what is that?

And it will not accept a replacement "6~63 ASCII character..."

as far i know this is the classic one & is been still up to date
http://www.draytek.co.uk/support/kb_vigor_multiplessid.html
You can change the default password of the wifi ( i did ) but may not allow to use few special characters for SSID of for keys or passwords ... seems have limitations & also the same seems apply & for the main admin passwords

OK - thanks - no special characters - and is there a character limit?

Was trying to cut and paste in a 40 character numeric/alphabetic password for WPA2/PSK which says "Type 8~63 ASCII characters ..."

Can anyone remind me where to check alpha/ numeric against ASCII?

you might be able to do that via telnet (woah that's a complex password), the web interface has sometimes needless validation in it.