Hi, Me again... As I noticed that others with RXTX Mismatches said their Bd works anyway, I proceeded with compiling and uploading (in Examples) Blink and it worked! So I edited it for longer blink rates and shorter ones and they compiled, ran and saved well, so I'm off and running! I may try to start on my XP box next.
Still, if Y'all know a solution to my RXTX mismatch problem, let me know.
And thank you Poliveira1978!
Jim