Installed fine, No sound, default graphics?

[Raidz1]

Hey,

I installed 10.5.2 Rev 1. just fine on my Dell Inspiron 1501, it takes a while to boot up to it though, almost acts like it freezes. But i have no audio, maybe i forgot a kext? I am just unsure as to which one i need. As for my graphics, i cannot choose a different resolution, the only one available is 1024x768.

Chipset
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Northbridge ATI Xpress 200 (RS480) rev. 10
Southbridge ATI SB600 rev. 00
Memory Type DDR2
Memory Size 2048 MBytes
Channels Dual
Memory Frequency 249.4 MHz (CPU/8)
CAS# 4.0
RAS# to CAS# 4
RAS# Precharge 4
Cycle Time (tRAS) 12
Bank Cycle Time (tRC) 17
Command Rate 1T


Also is there anyway to increase my Xbench score? It came out to a 66.7, Its pretty bad.

http://forum.insanelymac.com/index.php?showtopic=60924&st=0&p=432359&#entry4323 59
I had came across that, but not sure if those steps can be used in 10.5.2, since that guide is for Tiger.

Any help is greatly appreciated.

Thanks.