i found a method!

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i wrote a fast howto to solve all your problems. (as mine!)
www .ivanru. com/it/mobile/32-android-21-hero-root-and-delete-gmail-account
read it.

Originally Posted by lokiUnbound

( CORRECTED... )

You can modify the user directly using sqlite3, if you have root access. This prevents you from losing your contacts.

First, do a full backup using JF recovery console.

Then do a backup of your contacts DB, just in case and for reference:

adb shell
su
cd /data/data/com.android.providers.contacts/databases
cat accounts.db > /sdcard/accounts.db

Then copy it from the SD card to your computer.

Modify your account:

adb shell
su
sqlite3 /data/data/com.google.android.googleapps/databases/accounts.db << EOF
update accounts set username = 'MYACCOUNT@gmail.com';
delete from authtokens;
EOF
sqlite3 /data/data/com.android.providers.contacts/databases/contacts.db << EOF
update groups set _sync_account = 'MYACCOUNT@gmail.com' where system_id = 'Contacts';
EOF
sqlite3 /data/data/com.google.android.gm/databases/gmail.db << EOF
update accounts set user_name = 'MYACCOUNT@gmail.com';
EOF

and reboot. Go to Settings -> Data Sync, press Menu and Sync Now.

I am not sure if there's any additional action required to sync contacts, because I don't sync my contacts to gmail. You might have to touch the _sync columns in the contacts database.

just a modification, tested on Nexus S =>

update accounts set username = 'MYACCOUNT@gmail.com';

change to

update accounts set name = 'MYACCOUNT@gmail.com';

and reboot. I don't used over options ie sync et gmail

No to hard reset for google

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Hello!
My problem is,I still can't login to my new google acct despite trying things stated here like CLEARING DATA of google or gmail stuff etc. My MARKET/PLAY STORE already gave me option to log in either on my old or new add. Still, the others require my mail,first account. My phone is not rooted.PLEASE HELP.

try to add new account and make sure it is linked, then clear market data and user data, then remove old account

I only have MARKET UPDATER and MARKET FEEDBACK AGENT because I already cleared something beforehand which I don't remember what;o What do I do then? Thanks for the help!