Theoretically those instructions should work just fine. But now there is confusion as to where the failure is occurring. You shouldn't need to uninstall anything with pybombs, as it's pretty much self contained to two directories, "pybombs" and "target". If you want to remove the pybombs install anyway, just issue a ./pybombs remove gnuradio command in the pybombs directory and delete the directories and start over. Here is my advice to you at this point.

Go to your pybombs directory, and issue the following command: ./pybombs install gnuradio
If this fails to install, you should subscribe to the discuss-gnuradio mailing list. You will get more answers there as to how you should proceed. Be thorough with your questions, the more details you can give the better. List the hardware specs you're using(CPU, ram, etc), and the OS and version.

Once you have a successful gnuradio build, OP25 should not give you and troubles. If it does, then this is the place for help.

-Scott