ah I think you have misunderstood my comment. Converting between file types (XML, HTML etc.) isn't a problem.I don't see what's so scary about converting between a command line output or even relatively crusty html and xml. XML is just a text format with a tightly defined schema. You could write a program in perl, python, java almost any language if you wanted to do this repeatedly and relatively safely, or you could even do the conversion manually in a text editor for a one off.
The conversion I was referring to is converting the output from a generic checksum tool into a dat file.
Have you ever opened up a dat file in a text editor to look at its contents? If yes then maybe you will understand why it is going to be onerous to write this conversion code entirely from scratch (seeing as there is no foundation I can build off. Editing dat files for rom audit programs is too niche). It's not that I am incapable of writing this converter - I know that I have the skills to do it. It's the length of time that it will take to get it perfect.
If you are not familiar with dat files, you can see a small sample I attached to my thread here