[Typo3] Populate submenu form external source

[Andreas Weber]

Hello,

I have the problem, that I have to populate parts of a submenu from a 
database outside typo3. I have for example the following menu structure in 
Typo3:

* Menu 1
  * Sub 1-1
  * Sub 1-2
* Menu 2
 * Sub 2-1
 * Sub 2-1
* Menu 3
* Menu 4

Now I want to add submenu entries to "Menu 3" which are coming from an 
external database. I played around with includeLibs and post/preUserFunc 
TS, but all I got was always the menue name and never the link or the ID 
itself. I thought if I would get the complete menue entry of Menu 3 (with 
all tags and links etc), I could add the submenu to the content.

Can someone point me into the right direction?

Thanks 
    Andreas