Setup for 32 bit and for 64 bit (trouble with System32 and SysWOW64

Hi!

I am wondering if Setup Factory 9 offers a way to build a setup for x32 and for x64. At the moment I can only select either a x32 or a x64 setup in the build configuration.

With this options I have an urgent issue:
I have two DLLs which have to be correctly installed depending on the OS (32/64 bit).
Unfortunately I can't get it work properly.

I have
- my32bit.dll
- my64bit.dll



Under a 32 bit OS I need these DLLs under:
C:\Windows\System32\my32bit.dll
my64bit.dll not needed.


Under a 64 bit OS I need these DLLs under:
C:\Windows\SysWOW64\my32bit.dll
C:\Windows\System32\my64bit.dll

Unfortunately, at the moment both dlls will be installed into the same location (having a 64 bit system):
if I choose a 32 bit setup, both go into SysWOW64
if I choose a 64 bit setup, both go into System32


Question 1:
How can I force the my32bit.dll to be installed into WOW64 under 64 bit?

Question 2:
Can I solve my issues with only one 32 bit setup?

Thank you in advance.