That should be correct.
"Watashi" means "I", and "no" is sort of a possesive noun.
"Boku no" certainly means "my".
And the word for "your" is "anata no" (dunno about usage, but it's common)
Yeah, I installed the Japanese character thing for IE, I think just for ordering at HMV Japan (LOL) but I keep forgetting that they don't work everywhere :-P