Photoshop CS3: Making adjustment layers apply only to certain other layers

[motorollin]

I have Googled this and can't find an answer, and really don't feel like registering on a PS forum when I know there's a good chance someone here will know the answer. I have a document in CS3 with the following layers:

1. Adjustment (Hue/Saturation)
2. Text
3. Text
4. Adjustment (Hue/Saturation)
5. Raster

I want layer 1 to apply only to layers 2 and 3, and layer 4 to apply only to layer 5. Currently the effect of layer 1 cascades all the way down to layer 5, and so is combined with the adjustments made in layer 4. I suppose I either need to specify that layer one should apply *only* to layers 2 and 3, or somehow "break the chain" after layer 3 so nothing from above will apply below this point. Unfortunately I can't find a way to do either. Any ideas?

[X-ray]

If that was me, I would flatten 4 and 5 and only have one adjustment layer.

[motorollin]

I considered that, but I want to be able to re-adjust the properties of the adjustment layers until I'm happy with them. I suppose I could create a sixth layer, then merge 4 and 5 to 6, then hide 4 and 5. Then if I want to make any adjustments I can unhide 4 and 5, make the changes, then re-merge to 6.

This is messy though. It seems like an oversight that you can't be more specific about which layers the adjustment layer applies to, or put a block to stop the application of that layer below a certain point.