I eventually got it to work !

Here, in a nutshell, is what I did:

1) Compile the multi-project using 3DRad Compiler
2) Test the compiled .exe to see that you can switch between all your seperate projects.
3) If OK, then create an empty folder for your final moleboxed application
4) Start MoleBox Pro
5) Set the "Executable" to be your recently compiled .exe in (2) above
6) Set "Pack to" to a suitable .exe name (of your own choice) on the recently created folder in (3) above
7) Set the "Select package" to Default Package(executable)
8.) Activate the "Set FLAT mode" button
9) Activate the "Open root folder" button
10) From the dialog that opens up, drag the dll3impact.dll, your compiled .exe and the whole 3DRad_res folder (EXCLUDING the projects folder) to the ROOT in the lefthand pane.
11) Now activate the "Pack to box" button.
12) Use Explorer to check that your packed selection is now in your folder created in (3) above
13) Now, still in Explorer, drag, from your compiled folder, the 3DRad_res/projects folder (containing all your multiproject .3dr files) to your new packed folder.
14) Test your packed .exe by running it, and you should be able to switch between your various projects.
15) HOWEVER......your project files are still accessible by anybody, which you do NOT want !
16) To solve this, you must go back to MoleBox and configure an extra package which will include all your .3dr files.
17) To do this, activate the "Configure" button
18) In the popup dialog, under entry "File name pattern", change the "*.*" to "*.dat"
19) In the same popup, activate the "Create" button. Another popup "Package options" appears.
20) Enter "All Projects" as the Description
21) Enter "projects.dat" as the File name
22) Accept the default encryption options and Close the popup
23) When back in the main MoleBox window, under "Select package" you should now be able to select your newly created "All Projects" package
24) Activate the "Set FLAT mode" button
25) Activate the "Open root folder" button
26) From the dialog that opens up, drag only your 3DRad_res/projects to the ROOT in the lefthand pane
27) Now activate the "Pack to box" button.
28) Your packed project folder should now contain an extra file called "projects.dat"
29) Delete your .3dr files that are still in your packed project folder (see (13) (14) (15) above)
30) You should now be able to run your packed project .exe AND switch between projects AND have all your .3dr files unavailable for prying eyes !

Hope that all this is not too confusing...... anyway, it works for me......which makes me very happy !

Mike, you are 100% correct.

I must have been doing some little wrong thing on my previous attempts. The method you describe is what I have been doing for all my other single level projects, and everything has gone smoothly. As described in my initial post......I came up with this problem only when trying to molebox the multi projects. I followed the same procedure, but obviously I missed a step somewhere(?).

Anyway, after reading your post, I tried the simple procedure (as you described) again and,lo and behold, it worked.

BTW,the PRO version allows packing of  dlls.

All that work for nothing......oh well

If I execute the packed exe I get the error: failed to load dll3impact.dll
I added the file to the root. What did I do wrong?

Molebox needs files present on disk to work with 3drad multilevel projects. This method does not fail:

1) Molebox everything on your compiled project folder and everything inside each sub folder.  Do this by dragging the 3drad_res and other folders to the molebox window (timesaver tip courtesy of loop).
 
2) Create an empty version of 3drad_res folder tree.  Copy first your 3drad_res folder tree to another location and open a command window one level up there. Type "del *.* /s /q". This will leave you with a folder tree with folders but no files.

3) Put this empty tree along with your compiled exe distribution, outside the moleboxed files, of course.

 

nope, does not work. It only works with the projects in the projects folder and the directx files next to the molebox file. Useless.
Any alternatives?

I've had no problems using Molebox Pro with single level projects.
Loop, are you using the PRO version? Because I pack ALL dlls (including dll3impact.dll) using this version.

This post originated because I was having problems with multilevel projects, and which are now sorted out (as this post concludes). By the way, MH's comments have been deleted, but they were also positive about Molebox.

Concerning Osakit and Molebox:
As far as I am concerned, Osakit sucks from the first time I attempted to use it, and I've not touched it since!

Molebox changed their licensing ? Certainly not $99 anymore.
http://www.molebox.com/order.shtml