switching textures of individual prims in a linked set.

I'm using the freebie texture switcher in some walls of my house. I don't want to be able to change every wall's texture, so I only have the script in a few walls. However, I've found this weirdness:

I have 4 linked prims. A and C have no texture script. B and D have three textures and switcher scripts in their contents. If I touch B or D, they change textures without a problem and only change themselve, no others in the linked set. However, if I touch C, which has no script, it will change D's textures. I've relinked many ways with different parents and children, but I always have the problem.

I did discover that putting the switcher script in all the prims, but only textures in prims I want to change fixes the problem.

Now I have a house with 98 prims, and I don't want to install the switcher in each prim individually. Is there a way to do it in bulk? Is this a good solution to my problem?

Try http://www.lslwiki.net/lslwiki/wakka.php?wakka=llPassTouches

Thanks. So I do have to put a script into every child prim... Eesh.

No, just make sure there are no scripts in the root prim.

Edit: To expand on that, if there is a script in the root prim then yes, you have to put a script in all the child prims to prevent the touch been passed. But if the root prim has no script in it then there is nothing to pass the touch to, so scripts are not required in all child prims.

Solution:

One script in the root prim.
Give all the prims you want to change the texture on the same name.

On touch (of any prim in the linkset) loop through all prims in the linkset (llgetNumberofPrims()) look at the name of each prim in the linkset and if the prims name matches your criteria, use llSetLinkTexture() to change the texture(s) on the desired faces of the prim.

Benefits:
Requires just *one* script in the objects root prim.
You can expand this to change different prims based on parts of the prims names.

thank you all!