Obtaining updates for CF and CF Studio 4 and 5 releases
If you find yourself needing to reinstall your CF 4,4.5+, or 5 or Studio 4.5+ software, you may find that your install from the base CDs leaves you needing any of several updates or patches. You may have to struggle to find things, such as Studio 4.5.2 to update your Studio 4.5 install (for those still sticking it out at that release), or some Studio hotfixes, or the tag updater for making CF5 tags and help available in a 4.5+ copy of Studio.
See the page http://www.macromedia.com/support/coldfusion/downloads_updates.html.
It also lists all the CF server service packs, updates, and hot fixes for both for 4.0.1 and 4.5.1, as well as links to some security patches.
And if you're looking for an updater that provides a way to add CFMX support to Studio 4.5, 5 for the tag insight, tag edit, tag help, tag completion, and related features, see http://www.macromedia.com/software/coldfusionstudio/productinfo/resources/tag_updaters/.