the main thing with installing a gnome distribution on slackware is to understand what stock slackware packages it replaces. This list may vary between 12.0 and 12.1. A dropline for slackware 12.0 may have outdated packages when installed on slackware 12.1. This may break things.
Additionally! if you have already tried out various distributions, you have no doubt gotten your system in a very unstable and difficult state of repair. At this point, you might want to start over and re install slackware 12.1 before continuing further.
After that, choose a gnome distribution that is made for slackware 12.1.
THEN read all release notes as most gnome distributions for slackware require additional configuration.
keep in mind. The removal of a gnome distribution for slackware is often difficult. If you ever want to install gnome on slackware, I would recommend doing so only from a fresh install before you start adding your own extra packages. On top of that, packages you install may require gnome dependencies. Many of the packages on
www.slackbuilds.org require gnome dependencies and it is my belief that these gnome dependencies are badly managed and actually may not work well together at all.
So! if all this excites you then go right ahead! other wise... you might be better off with a distribution that already includes gnome.
I just got an idea! any thing on slackware that requires gnome dependencies should actually be built into the /opt directory with all libs included into the package.
I've recently noticed that whatever gnome packages slackware has by default are often relatively recent for when that slackware was released. Why then does none of the gnome for slackware people make a solid gnome release that doesn't replace them? Do you really need the latest gnome version? Would this not be the slackway? This would also provide a nice base for additional packages that people may want that only require 5 gnome dependencies.