As Mr F.N. says, if you install Informix on another server, you need to install the binaries adapted to the target machine, because you need at least you need to be licensed for this new installation, even for Innovator-C Edition.
As per data files, don't play with fire, run a dbexport/dbimport to migrate your databases.
If you are above 11.50 xC5, this is also an excellent opportunity to play around with the external tables instead of dbimport :-)
You will how faster this technique is.