[Grml] grml2hd with a preexisting partition

Hi list, I just discovered Grml recently. I want to install it on my laptop's hard drive, using grml2hd. The laptop already runs Slackware 11.0. I chose a really lousy partitioning scheme when I installed Slackware: /dev/hda1, /boot, approx 40Mb /dev/hda2, swap, approx 512 Mb /dev/hda3, /, the remaining 19.5 Gb

I don't want to get rid of /home when I install Grml, because it holds several gigabytes of assorted files. Is it possible to make grml2hd install to /dev/hda3 without destroying /home?

PS, this is a good argument for having separate / and /home partitions; wish I had done that on the laptop!

-- Chris