QUOTE(nightzstar @ May 2 2011, 01:42 PM)
ok thks
I faced some problem of stucked at android booting logo, end up i re flash to stock rom 2.1 back. Now i reapply the vulnerable sbf and G.O.T openrecovery 2.01. I did backup of my stock rom first before doing anything. After that, i rooted it. So far no problem.
Now the questions:
1. Can i test the backup whether it is working fine?
2. The correct step to wipe and install custom rom. The guide i read out there especially the xdadevs is still hard for a noob like me lol.
3. Where is the backup of rom located? I wanted to save the backup rom to my computer
4. Can i directly flash to cronos gingerbread rom from stock 2.1 and how to flash it properly. It is the flashing process same for every custom roms?
Thanks and sorry if i asked too much lol. Hope u guys can help me.

anyone can help answer?

i try as per my understanding
1-yes. you can try anytime nandroid restore and you will get same like before flashing any ROM
2- a)boot into recovery.
b)wipe dalvik , wipe cache,factory reset(if change different type of ROM)
c)update ROM / restore nandroid
d)reboot
3-/sdcard/nandroid/openrecovery/OR**/.md5 and .img. -> just copy this folder to PC
4-i can jump from any ROM to any ROM without problem even ginger to froyo and vice versa. i use Androidiani OpenRecovery.