I have added some icons to excel 2000 toolbars in order to more quickly work
on my spreadsheets. All the customizations disappear every so often. I
tried to locate the .xlb file per an article I read in this forum but I can't
locate the file. Also, I read that the file or the toolbar can become
unstable if too many icons are added, yet my customizations last for a long
period of time before they disappear.

Is there any way to make my customizations permanent? Can I back up the
customizations and make it easier to replace or insert the file, rather than
going through the trouble of having to start from scratch?

Thanks.