not updating XFree86 related stuff while performing portupgrade

[Michael Lee(HINET)]

Hi,

Is there anyway to avoid updating XFree86 related stuff while performing
portupgrade ?
XFree86 related stuffs are just too big and take too long for my poor PC to
compile them all.
I wonder if I should :

(1) disable fetching the XFree86 related stuffs in the port tree ( to set
something in pkgtools.conf
to avoid future updating XFree86 related stuffs while cvsupping  )
(2) cvsup'd the whole port tree and set some parameters ( and where should I
set them ? )
to prevent portupgrade from upgrading XFree86 related stuffs ?

Thanks!

Michael Lee