The ssw file is your MAIN firmware(*.mbn file). You need this MAIN firmware: W810_R4DB005_MAIN_VODAFONE_HN_RED49. But you have it already, I think...
Copy it to [SETool_folder]\make_rest\ folder.
Now open an command prompt(Stat menu->Run type cmd and press OK).
In command prompt type:
cd\ <Enter>
cd "C:\Documents and Settings\Rich\Desktop\SeTool_2_Lite_1.11__with_vid eo_tutorials\setool2lite_db2020\make_rest\" <Enter>
ssw2rest.exe W810_R4DB005_MAIN_VODAFONE_HN_RED49.mbn 44140000 <Enter>
If everything goes well, in [SETool_folder]\make_rest\ folder you will get the R4DB005_CXC12 50320_VODAFONE_HN file. Copy it to [SETool_folder]\rest\ folder.
Edit: There are some rest files here: W810_RED49_rest. I haven't downloaded it so don't know if it contain the rest file what you need...