[haskell-platform] #64: Add a vcvars32.bat-like bat file

[haskell-platform]

#64: Add a vcvars32.bat-like bat file
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 Reporter:  refold             |       Owner:  refold  
     Type:  defect             |      Status:  new     
 Priority:  major              |   Milestone:  2009.4.0
Component:  Windows installer  |    Keywords:          
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 To make it easier to use several HP versions installed on the same
 machine, there should be a convenient way to temporary modify the
 environment to make a specific HP version the default. If you have used
 Visual Studio, then vcvars32.bat is what I have in mind. Bulat also
 suggested adding a GUI tool for this. This ticket depends on #63.

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Ticket URL: <http://trac.haskell.org/haskell-platform/ticket/64>
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