When doing some conceptual design I don't want to assign part numbers to parts/assys/drawings because the design may change in a way that makes the item obsolete. The file names therefore tend to match the description. When the design has firmed up, I want to assign part numbers which also need to be used as the file names to guarantee they are unique. Also, the file name (i.e. number) determines which production folder the file gets saved in - each folder has a batch of 500 numbers and contains any part/assy/drawings within this number range. As you'll probably gather, we don't have PDM :-( I therefore need to rename the files and move them to the correct folder without screwing up any references. Does anyone have a slick method for doing this? Doing "save as" with all the related files open to maintain the links is a partial solution, but then I have to remember to go back and delete the old files (scope for mistakes) - this is made worse because sometimes either SWX or WinXP still thinks the old file is open and won't let me delete it until I've exited SWX. Any suggestions? Out of interest, do any of the PDM offerings solve this problem both for parts already in the vault (I presume they allow you to rename it and take care of any refs automatically), and also for those that have not yet been checked in? Regards, John Harland