New files on system (ocx & dll)

I have a program I wrote in VB 6.0. Up unitl now it has only been used on XP machines. Now I have one person that needs to run it on a Vista machine.
When installing it they get an error 7 times "A file being copied is not newer than the current file on your system. It is recommended that you keep your existing file" It is for mscomctl.ocx, hhctrl.ocx, msflxgrd.ocx, comdlg31.ocx, msstdfmt.dll, itird.dll, itss.dll, and hh.exe.
It worked if they just kept there current files.
My question is can I download the newer files and install them on my system so next time I build an instalation it will include the newer files?

It's basically the same issue we had back in Win2K/NT4 days - what we did was we setup multiple workstations for each OS and built distribution packages independantly.
I suggest [if possible of course] building Vista distribution package on Vista machine - some would say why even bother as all runtime files should already be there, but I just don't buy that idea.