Short subscription about formatting the Today's Play History:
Beware!!! It's dangerous to change Nand Files if you don't know what to do!!!
You should also make a backup of your system!!!
Dumping \title00000010000002\data\cdb.vff of the Wii Nand.
Open cbd.vff with a HexEditor.
The first lines are the declaration of numbers, symbols and letters. So don't touch it.
The messages begin at 002A020 (Hex Offset).
Every "Today's Play History" Message begins with Hex Code:
43444246494C45023C0762FBDF3E798A0C000000706C617974696D656C6F6700
(ASCII: CDBFILE.yŠ....playtimelog.)
The following text describes the text content of the message. (Till the total play time)
After that, the next lines gives the titel ID and additional coded Information about the Channel.
The Flag which initialize the text content is:
52 49 5F 35 00 00 00 00 00 00 00 00 00 00 00 02 00 3E 0E 7E 8A B4 B7 88 00 00 00 00 00 00 00 00
(Ascii: RI_5.............>.~Š´·ˆ........)
So, you can change the text of the today's play history between the flag and the total playtime.
A Today's Play History has always the same size. Independent how many games, channels you used.
(Length 1800 Byte)
If you change something at the duration of the playtime the Today's play History for this day will reset.
Don't erase a complete message. The message board won't show up the message (cause you deleted it) but the message box shows that you have one message.
After you start/quit a channel and check the message board, no message will appear, too.
So the amount of messages in the message box must be handled elsewhere in the system.
That's the info I got, sofar.