Root 2.3.5/2.3.6 issues after rooting

[Spanky333]

Ok so first off i am new to this.....I was ruining GB 2.3.6 and thought I installed 2.3.6 ROM but now it says i'm back to .5. It tries to install ths update but freezes up on reboot. First question is can I just flash a .6 ROM or do I have to unroot (if even possible) to install the update and then root usimg .6 ROM/kernel combo.

 

[Spanky333]

Also I am unabke to retrieve my contacts from Verizon.....help there also please