Homebrew developer, Tommydanger, recently updated his homebrew application, IceTea to v1.3. Aside from making Popstation-compatible PSX eboots, it also allows you to create PSP-compatible PSX eboots, extract ISOs from PSX eboots, create manual from png images, and to create manuals from a simple text file. All of these you could do just by using this one program. Anyway, here is the changelog for v1.3.

Changelog:

* fixed auto id bug
* ability to patch manual game id
* proper check of toc file
* reorganized menu bar

Tommydanger provided a very detailed readme file that comes with the download, so you won't have a hard time using this app.