Happy ending, I did it, it now boots from 8G SDHC int mmc2. Thanks for nhanquy, Genius Fanoush and Wonder Milhouse. Nhanquy PM me and made me tried it , and it worked.

Problem, Adata 8 G SDHC card requires a low level format before Milhouse's script (Mil, mind to edit your instructions so that user dont have to kick and scream to have it succeeded? Thanks)

Instructions for those who already have succeeded 1G or 2G OS clones but stuck on 8G or 16G, i.e., you already have everything you needed but stuck on the last step, here are the steps (based on Milhouse script here, http://www.internettablettalk.com/fo...ead.php?t=8631)

1) low level format your 8G card (or 16G), http://www.internettablettalk.com/fo...t=10417&page=2, thread #15; http://panasonic.jp/support/global/c...formatter.html
dl and install this on PC, the panasonic low level SD formatter (v2.0.0.2), then format your 8G card using option "Full erase ON" Format size adjustment "OFF", it will take more than 5 min to low level format a 8G card. Quick format will NOT work.

2) xterm/sudo gainroot
umount /dev/mmcblk0p1
sfdisk /dev/mmcblk0 -uM

/dev/mmcblk0p1: 0,7000,0C
/dev/mmcblk0p2: ,,,
/dev/mmcblk0p3:
/dev/mmcblk0p4:
reboot
This gives you .9G/7G partition.
Directly from Milhouse, http://www.internettablettalk.com/fo...1635#post81635, thread #49. Change above partition to suite your need.

3) xterm/sudo gainroot
cd ~/bin
./nupgrade.sh 0, 1, 2, 3, 4 and that is ALL!

enjoy

Edit: 16G SDHC successful. My current system,
2007.50-2 16G boot/8G KDE/N800.

This is for those still sitting on the fence about MMC boot: from diskUsage,

/rootfs - used .5G Free - .9G for a total of 1.4G
/mmc2 - used 0G Free - 14.7G for a total of 16G
/mmc1 - used 7.8G Free - .1G for a total of 8G
(sfdisk -uM first row: 0,14400,0C gave 1.4/14.7G, I think it is excess, I would recommend change that to 0,14900,0C to put more space back to storage. 1.4G app installation space may be a waste of space)

.9G space for app installation is the major incentive for MMC boot.
Using Milhouse scripts, I have successfully cloned/boot 2007.50-2 to 16G/8G/4G/2G/1G. Only the 16G/8G requires the low level format.
The 4G/2G/1G goes stright with Milhouse's script.

bun