Real install procedure wxpy 2.9

Hello, I'd like to ask to make a real install

(after python2.6 build-wxpython.py --build_dir=../bld)

(sudo) python setup.py install
a) how to install in /usr/local
b) how to install in /urc
c) how can I quickly switch between 2.8 and 2.9

There was once changing wx.pth file or wxversion select.

I forgot, how to handle this.

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Franz