upgrading 5.4 -> 6.0 without reinstalling. safe ?

[Pete French]

usually when I upgrade across major versions of BSD I wipe the whole
machine and re--install from scratch. But I understand that the move
to 6.0 from 5.4 is nowhere near such a big leap.

So I was wondering hether I could just do this from source without any
ill effects, as if I was upgrading 5.4->5.5. I have nnever tried this before
though, and was wondering if there are any major pitfalls (i.e. is it actually
a really bad idea?)

cheers,

-pcf.