adorety - paste the text into a new file with a .py file extension; for example: svdlfixpaths.py. You have to make sure that the .py is the file extension, i.e. it must replace the .txt that you would normally see on the end of a text file. To do that, you might need to go into Tools / Folder Options / View (this is on a WinXP PC, btw) and untick the box that says 'Hide extensions for known file types'.

Save that file in your default Poser runtime under:-
RuntimePythonposerScriptsScriptsMenu
Then start Poser, and you can run it direct from the Scripts menu.

Or you can save it in another location and run it using File > Run Python script.

(edit) by the way, Python scripts use line indentation for nesting/structure, so the cut and paste of text must be accurate.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)