There isn't a 64 bit .deb file available for the programs? I think the ia32-libs is just making 32 bit versions of libraries available on your system, until multi-arch replaces the need for this. It doesn't change that the packaging system still checks if the package is for your architecture or not (it is not in this case). ia32-libs is mostly useful, to me at least, for binary installations (in .bin or .tgz file). Mostly commercial games.
Anyway, you will have to force the packaging system to install the application and ignore the architecture check. Not sure this is a good idea! To install it this way, open a terminal at the directory that holds your .deb file (browse there with your file browser, then select from the File menu "Open in Terminal" or something similar). Then run:
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sudo dpkg -i --force-architecture filename.deb
Replacing filename.deb with the actual filename (remember that pressing Tab key on the terminal will automatically complete partially typed command or file names; or if not completing press Tab key twice for list of matching command or file names).