As someone requested, here are the drivers needed for Dell Inspiron 1545 notebook, after the update to Snow Leopard 10.6.2
All the drivers are 64 bit compatible.
-Audio: AppleHDA 1.7.9a4, patched for IDT 92HD71B7X. It also enables volume control (FN-keys) and internal MIC. Download
Install: install with Kext Utility. You need to put the supplied dsdt.aml in your / or /Extra directory.
-Keyboard+Mouse+Trackpad: VoodooPS2Controller, patched for latin keyboards + Alps GlidePoint Trackpad + 2 finger scrolling. Download
Install: delete ApplePS2Controller from /System/Library/Extensions, install AppleACPIPS2Nub (this version, not others) and VoodooPS2Controller with Kext Utility. Put Trackpad.prefpane in /System/Library/PreferencePanes
-Wireless Dell 1397 (Broadcom BCM4312): Latest IO80211Family patched to enable 14e4:4315 devices. Download
Install: install the Security Update 01-2010 first, then this driver with Kext Utility.