As of SAP media release SR3, ECC 6.0 will not install a Central Instance on a 32-bit platform. In order to get a new install of ECC 6.0 onto 32-bit hardware/OS, you will need to obtain the SR2 media. The SR2 media does not have the 64-bit restriction, but you will have to manually apply the SP stacks to get you to the same level as SR3. You can however install a Dialog Instance on a 32-bit system without having to perform the workaround.
I highly recommend, however, not using 32-bit hardware in new installs, because it is very likely that 64-bit will become a hard requirement for running not only new releases of SAP software but also for applying future support packages.
Hope this helps...
