While everyone is saying it does not work, i'm going to say it will but how well it will work is a second question.
Someone has installed K20D software on the K10D and that worked for the most part but i believe it was not quite that stable.
Now the K30 and K50 there is something else going on becasue by the looks of it those camera's are 99% the same on the inside so your changes are most likely higher.
The problem is though that you need to forcefully install the software, one of thw ways i believe was to adapt some lines inside the firmware so that it registered as it was for that camera model.
Other way was to force install with the debug menu.
If you're handy with these kind of things i wish you a lot of luck but if you've no idea then steer away from it
But in all honesty, i think the K30 and K50 actually already share the same firmware. Lets wait and see what happens when new firmware for the K50 is announced if the K30 and K-01 will also be updated. I think the changes are quite high they will.
Last edited by Anvh; 07-17-2013 at 03:21 AM.