Keep rules after hard drive name change

I have all of my rules that relate to a 2nd hard drive in my laptop 'Macbook HD2'. I have now put that hard drive into a mac mini, but if I rename the drive to 'Mac Mini HD2', all of the rules break. If I change the name back they work fine.

Now I guess it the end that I will just have to leave the name as it is, but I was wondering if there is a quick way to associate all of the rules to the new drive name.

Not really. If you find you commonly do this, you can set up your rules to move everything to a common folder, then file into subfolders. That way, you only have to change that location in that first rule.