DB2 Express-C on Vista/Business

Hello,
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Looking back on it - knowing what I know now - I should have run
setup.exe by right clicking and explicitly running as an
Administrator.
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Well, here I am. I installed DB2 Express-C from an account that is a
member of the Administrators group.
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I got a pop-up that said:
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One or more errors occurred while creating the DB2 Administration
Server.
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The DB2 Administration Server may not function properly
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Create the DB2 Administration Server manually.
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If the problem persists contact your technical service
representative.
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The successive popups displayed:
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1. An error occurred while initializing the Profile Registry.
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The return value is “-2079391743”. Contact your technical service
representative.
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2. An error occurred while setting the registry key “SOFTWARE\Microsoft
\MSDTC\XADLL\C:\Program Files\IBM\SQLLIB\BIN\DB2APP.DLL” to “C:
\Program Files\IBM\SQLLIB\BIN\DB2APP.DLL”.
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3. One or more errors occurred while committing the changes to the
user “DB2”. Create or make any changes to this user manually.
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4. An error occurred while creating the instance “DB2”. The return
code is “-1918”. Create the instance manually using the command
“db2icrt”.
>
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Now:
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A. Is there a registry hack to resolve item 2 (that also resolves item
1)? If there is, could someone be kind enough to step me through it?
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B. Should I create a DB2 users and make that user a member of DB2ADMNS
and DB2USERS?
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C. I was able to create a DB2 instance using db2icrt - so that worked.
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Incidentally, I added my account to DB2ADMNS and DB2USERS.
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