The headers for PDTH's V1 bundles are stored a bit differently; rather than having separate _h files, the headers are stored in the bundles themselves. The Bundle Modder/Diesel Toolbox doesn't support this by default, so this program will extract the headers from the bundles and export separate _h files.
Place in your V1 assets folder and run, either by command line or by double clicking it. My code is terrible and the error checking is non-existent, so I wouldn't recommend doing something silly like putting it in a non-V1 assets folder.
Not intended for the current version of PDTH. Requires Java to run.
Source code is included in case you're paranoid, or otherwise want to criticize my shoddy coding. Special thanks to Spy for telling me how the headers were stored.