[MAMBO] several instances of gallery in a mambo

Hi There,

I want to use several instances/installations of gallery in a mambo-installation independently.
So I'm experimenting with 1.4.4.pl2 with mambo 1.5.1. As the component which comes with gallery to embedd it into mambo does not work with mambo 1.5.1; I used the alternative one from glasgowsports (but there seems to be little difference).

I tried two ways:
-> on the one hand clone and modify an already installed and working component:
- Database: copy&modify mos_gallery to mos_gallery_2 and add an entry in mos_components
- copy&modify ../components/com_gallery and .../administrator/components/com_gallery:
#__gallery -> #__gallery_2

on the other hand, I tried to modify the component before installing:
changes in files like above, plus: gallery.xml: change the DB-specific queries to create not mos_gallery but mos_garllery_2.

In both cases, the result is the same:
- Frontend: " The page you are trying to access does not exist."
- Backend: There is a Link to all 3 (preinstalled + cloned&modded + modded&installed) adminpages, but pressing one of the new leads just back to Control Panel home.

I don't know what to do any more.
How can it be that I clone a working component installation, only change the DB-queries and paths from working to also working (standalone) ones and it doesn't work?
I mean, either I missed sth. - then the old page should be displayed, or I get it - then the new one. But why none at all?

Can someone help?

Thx, southy