I'll remind people there is an Apache OpenOffice port available here:
https://www.bitwiseworks.com/products/ports.phpThis thread has drifted way off-topic. Maybe an admin could break it up?
I think it might be interesting to create a 64-bit host program to act as a helper for OS/2. Then some commands could be routed to the 64-bit host, while maintaining the original OS/2 in good condition. Essentially, a 64-bit API could be interpreted by the host. Data would flow between the host and OS/2 with some inter-process communication yet to be determined.
There is still the difficulty of switching between 64-bit and 32-bit operation by the CPU, but at least some 64-bit operations could be fit into existing OS/2.