i don't blieve !!!!
no one knows!!!!!
where's expert ones ?
where's developers ?????????
Just build your own image, it's much easier and less error prone then messing around in an existing image.
Well, every team have own sources what mostly are NOT public.
I recommend the You for first take a look at .: C++ for newbies :. and learn C++
Then make an google search and find sources what You can compare with cvs.
When You compare that, then will find out how to change/add things You mentioned above.
Cheers
Use google and you'll find everything you need...IMHO.
try fg: howto-build-complete-image-any-dreambox
that's not help
where's professionals & expert ones ??????
You got expert advice: "Just build your own image". You even got an explanation how to use google to find help doing so. But you don't want it. Well, then we cannot help you.
There is no easy way of doing what you want. To create a "maxvar" image, you need to patch the kernel sources and recompile. The easiest way to do this is to build your own image. While you are at it, you can add whatever you want, change the bootlogo, etc.
It will need some programming skills, though.
OK, let's conclude something....
You say that build Your own image, right? So, that's factory one.
Rules of board NOT ADMIT anything except official support, so We cannot help You with patches, sources or anything else EXCEPT official CVS.
Second, there are plenty of forums outside this one where You will get support about things You asking for 
As You ask here for blue panel, control panel, .... name it how You want, NO HELP WITH THAT HERE!
About plugins, that's another story BUT depend of what kind of plugins You mean?!
About "how to include them" same answer as seife and I was mentioned above: google and compare, that's everything what We can say and that's only help what You will get here.
Once again: nobody here is not "in the mood" to make image for You. It's on Your own.
Cheers
Welcome 
