Hello,
what i have done is used Norton Ghost to make cd-image-set of my basic setup with added tweaks. You can then screw around to your hearts content and if you must restore, it takes about 15 minutes. Then you must use something such as system restore or slax to boot up your install. Then mount you restored install, chroot in, and run lilo. Then when you reboot you have a nice working slack 10 again, or i do
What maybe easier that i am now about to do. Is have 2 installs of the same distro, sort of my own stable/testing and then the experimental. The first one i will not fool with much as i do need to get a few things accomplished. But the other install is fair game for anything. If ya scre it up just copy the partition back over and start again.
Hope that helps
Boutros