Rip the (PAL) LD's. Upscale to anamorphic, run filters over the frames, etc. Then replace frame-for-frame every frame that was not altered in the original (from either the HD-TV rip, or the PAL DVD whichever is the better source). That way you keep the LD's audio without splicing it, and it's still frame-for-frame the same as the LD ecept with better quality where available. The quality would drop here and there, but it would be the best possible preservation. Of course no one except me would ever do it.
Rip the (PAL) LD's. Upscale to anamorphic, run filters over the frames, etc. Then replace frame-for-frame every frame that was not altered in the original (from either the HD-TV rip, or the PAL DVD whichever is the better source). That way you keep the LD's audio without splicing it, and it's still frame-for-frame the same as the LD ecept with better quality where available. The quality would drop here and there, but it would be the best possible preservation. Of course no one except me would ever do it.