Everything is working fine up-till now, I am getting system freezes when I try to save large files from photoshop or if I try to open up large rar files.(trying to open a 5.6 gb rar folder) I have tried cpus=1. does anyone have any suggestions.

10.5.2 re2 MBR EFI + 9.2.0 kernel
Processor - AMD6400+
Motherboard - MSI K9N Diamond
Memory - 4 gb kingston DDR2
Hard drive - SATA 160 GB /SATA 320 GB/ USB to IDE 320 GB(time machine)
Video card - ATI X1950 pro