Disklavier

Dear Group,

I'm the soon-to-be proud owner of a DC6M4t.  Now that the 2.0
software/firmware is released for the Disklaviers, I'm looking forward
to Disklavier Radio and direct connection to the internet.

What exactly will I need to achieve this connection?  My Yamaha dealer
is a piano wiz but not that computer savvy by his own admission.  Some
thoughts/questions:

- I assume the Disklavier M4s serve as a 802.11b access point based on
some research.  Can they also serve as clients for a different 802.11
access point?

- My dealer showed me an email he just received from Yamaha saying
that to connect to the internet wirelessly, Yamaha will only support a
certain Buffalo Technology Wifi product.  Alternatively, the email
says an ethernet cable can be plugged into the M4 (yuck).

- I have a standard linksys 802.11g wifi network covering my house. 
Is there any way I can simply configure the DC6M4 to use this network
for connection purposes?

(Not wifi related) I have a CD-ROM of MIDI files; will I be able to
simply insert that CD-ROM into the Disklavier and copy its files onto
the Disklavier's hard drive?

Thanks for your help and insights.