It sounds like your current method uses Windows XP’s CD writing facility (please confirm). You’d use My Computer or Windows Explorer to go to a folder with the pics you want to write to CD. After highlighting just the ones you want to copy (pressing “Alt” and clicking on each thumbnail view of the pic), you would click “Copy to CD”. Please confirm if I’ve guessed correctly.
From your earlier thread click here you’d mentioned that CD-Rs you’ve used seem to only be able to store 500 Mb of pics on what is supposed to be a 700 Mb capacity on a CD-R labelled as CDR80.
CD writing software such as Nero will give you a graphic view of how much capacity is left on a CD-R and how much you are trying to add to it, before you burn the CD-R. Do you have any other CD-writing software programs?
Without such software, I don’t think Windows CD-writing facility gives you any other means of checking whether the total size of your pics will fit onto a completely blank CD-R or even a partially filled one. So I’d suggested a work around of creating a separate folder where you can put copies of the pics you wish to burn to CD-R first.
I don't have experience of the Photo Editing programs you mention so will leave others to comment.