My current workflow is as follows:
Import into LR onto local hard drive and make adjustments > Export photos as .tiff files onto local hard drive > Run batch script on .tiff files in CS2 for noise and USM - this also includes anothe subfolder with conversion to .jpg files > Export .jpg files onto networked hard drive > Import folder of .jpg files back into LR !!!
I have a few reasons but at the end of the day I am aiming to achieve placing processed photos as .jpg onto a networked hard drive and have them show in LR.
Hope this makes sense and someone can provide some advice on how to improve this tedious task !
Cheers

