Loosing custom menu

It's called "Create a Backup".
Do your stuff, and create a copy of your support folder. If your system crashes, you can reinstall AutoCAD and then replace the new Support Folder with your copy. Make a change, create a new backup.

You do not have to back up your entire support folder. You should however copy your ACAD.MNU file and rename it to something like "mytools.mns" Then using the menuload command you can load your new menu file and make changes to it. If you are having problems with your system crashing you should make a few changes and then exit AutoCAD then restart and make a few more changes. Shutting down AutoCAD will force the program to create and compile a new .mnc & .mnr file which will keep you from losing everything. If your serious about customizing your toolbars you should familiarize yourself w/ editing your toolbars in the .mns text file(using notepad or wordpad). It's a bit complicated at first, but if you read through the documentation in the help files you will catch on. It will take a little trial and error but once you get it you will never have problems w/ toolbars again...start small and add on as you begin to understand. I would recommend that you stay away from loading or editing any .mnu files.
Good luck....

I find the best way to do any menu customization is with notepad or any other text editor. That way fickle old AutoCAD won't crash while you're right in the middle of something and you can enter the real bitmap names for your tool icons instead of letting AutoCAD do it. This eliminates the dreaded "happy face" icons. Just be sure to create the icons first and name them a logical name so you can just run through the directory later if you can't remember what they were. Remember to enter your bitmap name twice, once for normal and once for large buttons. If the macro isn't too long you can use that for your bitmap name. You can also associate help strings more logically this way.

Your right, you do not have to back up the entire folder, but based on Trail Shredder's post, he knows little to nothing about customizing and restoring the customization. What about the bmp files for any custom buttons, the pgp file, arg file and so on. In Shredders case, zipping up a copy of the support folder is the fastest and easiest way for him to back up and restore his AutoCAD customization until he gets familiar enough to create his own partial menus loaded from a seperate folder with ALL his customization.

Chip, Your right too. Backing up your support files is a good approach and you will be glad you did if you run into any problems. Hopefully Trail Shredder has enough info to get started and avoid all those smilely face icons...