Setup Error: Data source name not found and no default driver specified

I am getting the following error during the setup of the database engine (the other parts seem to install properly):

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SQL Server Setup could not connect to the database service for server configuration. The error was: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified Refer to server error logs and setup logs for more information...

For help, click:http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft%20SQL%20Server&ProdVer=9.00.1116&EvtSrc=setup.rll&EvtID=29545&EvtType=lib%5Codbc_connection.cpp@Do_sqlScript@OdbcConnection::connect@x8007ea75
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The machine in question is running/has installed the following:
XP SP2
VS 2005 (beta2.050215-4400)

The following seem to have installed properly
Microsoft SQL Server Analysis Services Designer
Version 9.00.1116.00

Microsoft SQL Server Integration Services Designer
Version 9.00.1116.00

Microsoft SQL Server Report Designer
Version 9.00.1116.00

Microsoft SQL Server Report Model Designer
Version 9.00.1116.00

Previous beta versions of VS and SQLServer were installed at one point, but were removed per the instructions for installing the latest VS beta. The Express Tools were removed prior to the failed install.

What do I need to do to get the install to succeed?

[1840 byte] By [stand__sure] at [2008-2-27]