When kernel module extensions are loaded, udevtrigger is run to load the modules saving the time and troubleshooting of using those extensions. That does however prevent having alsa_modules.tcem and OSS installed at the same time. To support extensions that depend on alsa libs, I could remove the alsa.tcel.dep file that calls on alsa_modules and instead list the need for alsa_modules for sound in the info file. That would still be simple but give more ability to install the alsa libs without the kernel modules that conflict with OSS.
Also, the getflash extension as well as the resulting flash install works natively with alsa. No need for OSS per se, either will work fine.