How to select Oracle Home

Probably an embarrasingly simple question but nevertheless it has me stuck. I just installed Oracle 11gR1 on a windows server 2008 box and now have both Oracle 10gR2 and Oracle 11gR1 installed. The Oracle Home Selector is no longer available from the start menu and the installation guide suggests using the Universal Installer to choose between homes. I am unable to figure out how to do this. Please guide me. Thanks.
Bill Wagman

The HomeSelector has now been folded into OUI. The following steps would help in accomplishing this task:
Bring up the Oracle 10g Installer and Click on Installed Products. Then go to the Environment tab.
Here you can find the HomeSelector which uses the OUI inventory to list the homes. The old Home Selector used the registry entries to look at the installed homes. But in Oracle 10g the registry entries use the KEY_ format.
Hence the old Home Selector will not be able to see Oracle 10g homes in the list. If you want to switch between 8i, 9i and 10g Homes, use the Home Selector which is available inside the 10g installer.

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you haave to switch off vmware add new disk from vmware console. then using format tool you can add partition for unallocated space. and add them in volume.
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http://muffinresearch.co.uk/archives/2010/03/30/adding-more-disk-space-to-a-linux-virtual-machine/
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Thanks for your reply.
It's precisely the registry key which got tampered, and there's no ORACLE_HOME environmental variable(Or that too is tampered)
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password: mypassord
step3:
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Folks,
Hello. Thanks a lot for replying.
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Check out Metalink Note:191567.1
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Step 11.
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How to select a substring in oracle up to a more than one specific character

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5 --
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How to select Oracle Home

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