Ignoring case sensitivity in filenames?

The VB6 project I work on sometimes renames designer (.dsr) files
to use upper or lower case, and it confuses subversion/tsvn.
Is there a way to ignore or turn off case sensitivity in filenames?
Alternatively, is there a way to map files to be the same
(e.g. SummaryReport.Dsr is equal to SummaryReport.dsr)?

Any help would be appreciated!

-- 
Chris Johnson
Christopher.A.Johnson@gmail.com
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