(Somewhat O.T.) FreeBSD upgrade?

[John W]

 I have a copy of FreeBSD 4.1 and was thinking of installing it on an old 
Compaq Deskpro and noticed on the FreeBSD site that they are now up to ver. 
4.4. Does FreeBSD have something along the lines of Debian's apt-get dist 
upgrade to perhaps bypass downloading the latest version of FreeBSD and 
having the latest ? I have little experience with the *BSD's so I am not sure 
if it is even possible should such a program exist to jump up so many 
releases.

 TIA,
 
 John Wheat