If you're on AC8, contact your reseller for a free upgrade to 8.1 (unless your copy is pirated). 8 was full of bugs.
The HP's IP network address will have to be read at the machine - contact HP or search the internet.
The rest should be resolved with enough memory ( I recommend 1GB with that machine) and upgrading Apple's system software to OSX 10.4. I'm running a G4Duall 533 without problems.
AC4.1-AC26SWE; MacOS13.5.1; MP5,1+MBP16,1