Unstable applications and "About this mac" crash on a SSE2 Non-EFI P4

[Gounah]

Hi ! I've been running JAS 10.4.8 beta 2 with 10.4.10 update... Almost everything was working fine... I've tried other distributions but the only one that worked on my computer is the one from JAS. Now I'm trying to install the JAS 10.5.4 distribution. I'm able to install it and to boot on it but applications are crashing all the time and when I open "About this mac" it crash.

 

My hardware is :

Motherboard : Intel D845HV ( I think it doesn't support EFI )

RAM : 1Gb (PC133, 2x256Mb & 1x512Mb)

CPU : 1.7 GHz (willamette I think...) ( fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm up pebs bts )

Graphic card : Geforce FX5200, 64Mb ( I installed the Natit package from JAS 10.4.8 and it seems to work fine )

Ethernet Adapter : 3COM 3C905B-TX

HDD : Maxtor 160GB (Ultra-ATA)

DVD Burner & DVD Reader & Floppy Drive & FireWire card (PCI card)

 

So what I'm asking is what packages should I install ( I don't really understand what package does what ) and what could be the cause(s) of my problems and what is the limitations of my hardware?

 

Thanx and sorry for my poor english....