You could also just leave these files for a small DX setup, only ~6mb
Code:
Apr2006_xinput_x86.cab
APR2007_xinput_x86.cab
AUG2006_xinput_x86.cab
Aug2008_XAudio_x86.cab
Aug2009_XAudio_x86.cab
DSETUP.dll
dsetup32.dll
dxdllreg_x86.cab
DXSETUP.exe
dxupdate.cab
Feb2010_XAudio_x86.cab
JUN2008_XAudio_x86.cab
Jun2010_D3DCompiler_43_x86.cab
Jun2010_d3dcsx_43_x86.cab
Jun2010_XAudio_x86.cab
Mar2008_XAudio_x86.cab
Mar2009_XAudio_x86.cab
Nov2008_XAudio_x86.cab
Oct2005_xinput_x86.cab