Hi,
I'm a new Megaflash SD user and while the Megaflash SD worked great using the SD card to play a couple of .dsk games (withe START) and to listen some .mgs tunes, I messed up while trying to install, in the Megaflash SD memory, some .dsk games that couldn't run with START.
So now my MSX does not boot on Nextor anymore, but on the blue BASIC screen (Nextor BASIC v2.01 beta 2).
I found a webpage with some instructions for this type of case, but it didn't work for me. 
Here is what I did :
1) I reformated my SD card under the BASIC with CALL FDISK.
2) I copied kernel.dat into the SD card.
3) I entered the recovery mode and erased everything in order to reinstall the cartridge properly.
4) Then I used the F4 option "Install cartridge kernel", it reinstalled correctly the kernel.
5) I copied OPFXSD, DSKROM.ROM, and ROMDISK.DSK into the SD card.
6) Under the BASIC, I typed (as explained in the website) OPFXSD DSKROM.ROM /i1 but I had a "Syntax error" message.
7) The same occurred when I typed OPFXSD ROMDISK.ROM /id, I got a "Syntax error" message.
Well, as a novice MSX user, I don't know what to do next. I'm stuck, so I hope someone can give me some help.
I hope I didn't damaged the Megaflash...
Thank you for your help Guillian. KERNEL+ROM DISK worked very well, the Megaflash is now running fine.
However, I made another try with opfxsd to flash some .dsk games, and whereas the first .dsk has been correctly flashed (I rebooted the MSX and the game ran perfectly), when I flashed the second disk (the game is 3 disks), the flashing of the .dsk did hang a short time after it began. I had to reboot ant start again. And then, once again, it hung just before reaching the end.
Fortunately the third attempt was successful. The flashing process seems a bit unstable. Or maybe I'm missing something somewhere ?
