Hi
Unfortunately Ollybone doesn't work on a VM. If you try it on a real XP system you will probably find that it does work correctly, depending on the packer.
I had worked with the sources for a while to try to figure it out, I think it might have had something to do with the (VM emulated) dTLB not being flushed correctly. I actually did get it working a few times by forcing a flush somehow, but it wasn't stable and more often than not locked up the VM.
If you google around a bit you can find a couple of other mentions of Ollybone not working on a VM. There may be other options, but I'm not sure of the current state of automatic unpacking solutions.
Oh, btw: the load error you're getting, which was your actual question, does have to do with ollybone not finding the driver, if you keep messing with the suggestions in the thread you linked you should be able to get it loaded. But, it still won't unpack in a VM
Kayaker