[Clc-crux64] migrate to danm iso?

Hi guys, I'm using Jeremy's x86_64 iso right now, but because of the lack of support, actually his site has been done for a while, i would like to switch to danm's iso. However I wouldn't like to just reinstall the system, whould it be possible to just pkgadd -u some packages and then edit the files in /etc/ports so that i get danm's repo's, or will i break way too much things and i better reinstall? If i can just upgrade some packages, which one should I upgrade except glibc and gcc ? Cheers, Ilf