Ok that helped A LOT. Just loaded the BASE OH II v1.3 and I have my seawalls back
But as I was leaving Wilemshaven, the lighthouse would blink in and out. It would be there if I didnt look directly at it, but would disapper if I did. So I suspect you are correct. It is a memory issue with my machine.
Looks like I will have to wait to enable all your (and fellow contributing modders) goodies until I can upgrade to a 64 bit system and get a few more gigs of RAM.
Meantime I will look into that 3GB switch you were talking about...
thanks again for your help!