get usb sound support in varkey's rootfs

I am running varkey's rootfs on my pogoplug b04 (http://forum.doozan.com/read.php?3,6336,6371#msg-6371)

I want to use my usb soundcard so I can use pogoplug as audio streamer. But the usb sound module is not loaded in kernel. I did some googling and tried with following commands

downloaded source; apt-get install linux-source-2.6.32
make menuconfig
put an M in front of ALSA usb Soundcard
make modules
make modules_install

but it's not same kernel it's all placed in other directory. modules don't get loaded. Anyone knows how I can add these modules to the same kernel version as in the rootfs on my stick?

thanks.