shorter binary id
got error message
[exec] C:\brsh\installer\win\VCRedist8.wxs(37) : warning CNDL1000 : The Binary/@Id attribute's value, 'vc2008SP1Redist_x86.exe', is 23 characters long.  It will be too long if modularized.  The identifier shouldn't be longer than 18 characters long to allow for modularization (appending a guid for merge modules).