Sorry, I had this written and lost it.
First I apologize for missing your model #.
The interesting things on this side of the pond are N = WWAN Carrier????? and the A at the end is Australia.
Now to find the upgrades.....I have them here somewhere.
As you seem to have figured the CF-19 needs a Vista bios. So we look for a bios that reads XP>>Vista.
http://pc-dl.panasonic.co.jp/dl/docs/01 ... &trn_org=2
Please check this out. It seems to fit the bill.
I think some faulty homework was done here (jp site)as both sets of bios and ec have the same number. Again look for the XP>>Vista bit.
Good luck,
Jeff ...I do this with CF-30 all the time but rarely if ever for CF-19..both MK1 had no entry in the bios to switch Touch to Tablet and that is what is needed...