If you haven't tried any version of Linux before Teho, I recommend you try and find the PS3 version of Ubuntu as that is the most user friendly and easiest to use Linux distribution around at the moment.

Here is a guide: http://news.softpedia.com/news/Ubunt...S3-52699.shtml

For installing emulators and most other applications on Linux, do remember that you may need to compile the source code first on the PS3 before installing it, as this is one of the more complex things about Linux. Most packages are the source code, so that they can be compiled to run on any version of Linux, and on any hardware platform. Not as user friendly as Windows, and sure to scare any Mac user for life, but much less restrictive.