Hi André,
Sorry for not responding sooner, no power for a few days due to big wind.
Yes, you should never have any of the Mozilla apps on LIBPATH, so home directory of xul.dll.
Loading the DLLs into high memory is a users choice. Generally a good idea due to the shortage of address space in low memory. Note that you need a recent kernel ideally due to bugs in older kernels. Some or most of these bugs may happen when unloading the DLLs, so mozturbo maybe a workaround for that as well.
If you do load into high memory, when unloading, the kernel will not unallocate the memory, so you lose memory anyways, even if working on large databases etc.
It does jsut load the DLLs and I have an update to push that uses less memory but doesn't work as well as a turbo launcher, there's a switch to bring back the current way it works. I'll probably upload tomorrow after considering whether to make it a PM app. I'll look at Van Wijk's PMTPOSD2 later.
BTW, with mozturbo running and doing various tests which involved unloading and reloading, I managed 8 days of uptime, usually the system traps or locks up after 2-3 days. Been years since I've had much more then 3 days uptime.