Many thanks Alex, you have built the kernel with some of the features i have looked for. As i'm not using opkg in Debian i simply extracted the kernel and the modules into the boot and lib/modules directories overwriting the old stuff. Finally a "depmod" and all works fine.
I'm also wondering why my soundcard (Terratec Aureon Dual) was not shown with lsusb before but whatever, now it works excellent. After connecting it the usb-snd-audio module is loaded and for Alsa it immediately comes up as card 1. It's not necessary anymore to know the data of your headset.
Thanks again and i'll keep watching your repo!
Regards, Manfred