[32bit-64bit] MS Access DB Engine (32-bit) with Office 64-bit

If both versions of Microsoft Access Database Engine 2010 can't coexists, then your only solution is to complain to Microsoft, regarding loading 64 bits versions of this in your 32 bits app is impossible directly, what you can do is a service that runs in 64 bits that comunicates with another 32 bits service or your application via pipes or networks sockets, but it may require a significant effort.