You are correct Dave it is 157,213 bytes. My excuse is that I had someone talking and I wasn't concentrating.
Any way, I wiped the disk and copied over a new OS/2 image that includes all the extra DLLs in a specific DLL directory, used a new partition to install Seamonkey but left the mozprofiles directory as it was from before and now Seamonkey does accept addons although getting them installed is slow because doing so runs the CPU at 100%. Once installed and having closed the addons tab the CPU reverts to normal operation - since I don't anticipate having more than my normal 10 addons I don't see the 100% usage being a problem.
BTW, why are some of the Seamonky DLLs read only?