What do I need to install and run Gallery 1.5.3 ? On a MAC G5

The following information is required to get an answer:
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful):
Gallery version:1.5.3
Apache version:
PHP version (don't just say PHP 4, please):
Graphics Toolkit:
Operating system:OSX 10.4.7
Web browser/version (if applicable): SAFARI 2.0.4,FIREFOX 1.5.0.6
I have a Dual 1.8 GHz PowerPC G5 Macintosh with 2 G ram