Error when trying to install 20th Century Weapons

[Integrater]

Hi, when I try to install this mod with flash I get this error:

Traceback (most recent call last):
File "bash\basher.pyo", line 8364, in Execute
File "bash\bosh.pyo", line 14850, in install
File "bash\bosh.pyo", line 13937, in install
File "bash\bolt.pyo", line 2520, in __call__
File "bash\bolt.pyo", line 2520, in __call__
File "bash\bolt.pyo", line 2491, in __call__
File "bash\balt.pyo", line 1077, in doProgress
File "wx\_windows.pyo", line 2971, in Update
File "encodings\cp1252.pyo", line 15, in decode
UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 117: character maps to <undefined>

How can I fix this please?

 

Thanks

[Integrater]

Does no one know what might be causing this? Any ideas at all?

[Integrater]

I just manually extracted the files into the data folder, bypassing that error.