Unable to cook patched T-CHL7DAUC for LA40B650

[durgaacharya]

Hi there,
Trying to make patched firmware from T-CHL7DAUC for my 2009 LA40B650. Followed the instruction posted:
Download SamyGO Firmware Patcher script from download area. DONE AND OBTAINED A FILE WITH NAME "SamyGO Firmware Patcher v0.24"
Download your devices original firmware from Samsung site. DONE
Extract downloaded original firmware (by double clicking at windows or using unzip on Linux, OS X...) DONE
patch it using SamyGO Firmware patcher as "python SamyGO.py <your extracted firmware directory>" I am getting problem here as I could not understand the instruction as I do not have advanced computer skill.

Few questions here: Do I need to change the name of SamyGO firmware patcher file to SamyGO.py before I run python ?
I installed Python2.6.4 and when I try to run this command line in Python:
python SamyGO.py c:/Sam/T-CHL7DAUC
it says syntax error : Invalid Syntax error

Any help for me?

Another question: is there a way to know whether output file I get is patched version (for example change in file size? extra files?) Does patched firmware has different file size compared to original ?

Your help much appreciated.

Regards.