I've just tried to copy and paste the whole content of Python27 folder within the main "Quantum GIS Lisboa" folder in the Python27 main folder in my hard drive C, since I saw ArcGIS and Python were working fine like that. Then I tried to launch the IDLE found in "lib/idlelib" ("idle.pyw") from the new folder but this didn't solve the problem. Everything seems to point to the right folders in the system environment. Here is the print of the sys.path after the "reverse" trick:
['C:\\Quantum_GIS_Lisboa\\apps\\qgis\\bin', 'C:\\Quantum_GIS_Lisboa\\apps\\qgis\\python', 'C:\\Python27\\ArcGIS10.1\\lib\\site-packages\\Pythonwin', 'C:\\Python27\\ArcGIS10.1\\lib\\site-packages\\win32\\lib', 'C:\\Python27\\ArcGIS10.1\\lib\\site-packages\\win32', 'C:\\Program Files (x86)\\ArcGIS\\Desktop10.1\\ArcToolbox\\Scripts', 'C:\\Program Files (x86)\\ArcGIS\\Desktop10.1\\arcpy', 'C:\\Program Files (x86)\\ArcGIS\\Desktop10.1\\bin', 'C:\\Python27\\ArcGIS10.1\\lib\\site-packages', 'C:\\Python27\\ArcGIS10.1', 'C:\\Python27\\ArcGIS10.1\\lib\\lib-tk', 'C:\\Python27\\ArcGIS10.1\\lib\\plat-win', 'C:\\Python27\\ArcGIS10.1\\lib', 'C:\\Python27\\ArcGIS10.1\\DLLs', 'C:\\Windows\\system32\\python27.zip', 'C:\\Quantum_GIS_Lisboa\\apps\\qgis\\bin', 'C:\\Quantum_GIS_Lisboa\\apps\\qgis\\python', 'C:\\Python27\\ArcGIS10.1\\Lib\\idlelib', 'C:\\Users\\Umberto\\Desktop'] Traceback (most recent call last): File "C:\Users\Umberto\Desktop\set_qgis_01.py", line 5, in <module> import qgis.core ImportError: DLL load failed: Impossibile trovare il modulo specificato.
Am I suppose to point to the Quantum GIS main folder as well as it contains a folder named "lib"?