How to uninstall all oracle and get a clean install?

how can I uninstall all oracle files and get a clean install?
the installer does not let u delete the installer program and some other components.
i installed 8lite first then uninstalled as much as i could.
Then i installed 8.1.6 personal as oracle home 2 and it did not install properly.
Now i had 2 homes, so I uninstalled 8iPersonal and deleted all the folders from the C: drive.
How do i remove the registries without corrupting anything else?
Is there an easy way to remove Oracle?
Thanks

do the following:
stop all the oracle services:
delete the oracle folder..then go to regedt32
and look for HKEY_LOCAL_MACHINE
under softuser delete all the key related to oracle...and under services delete all the key related to oracle..
then restart you machine...and you should be
good to go..
Good Luck
Shah

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Do I first do a journaled format on the new drive...? And if so how do I download LION from the APP store and pointn the install at the new target drive?

How to Install Lion Successfully
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Boot from your current Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger) and/or TechTool Pro (4.5.2 for Tiger) to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
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Click on the Restore tab in the DU main window.
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Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
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C. Important - Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
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How do I uninstall firefox 4 and get back to firefox 3.6.13?

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How to uninstall all oracle and get a clean install?

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