Which (Snow Leopard 10.6 or Lion 10.7) are you installing? What is the exact model of your netbook/motherboard ?
If you are setting up an older netbook and have a compatibility package or kext file for the GMA 3150, follow these steps to install it safely. Step 1: Back Up Your Existing System
Open your bootloader configuration file ( org.chameleon.Boot.plist or your Clover config). Ensure the following boot flags are set for compatibility: arch=i386 (Forces 32-bit mode necessary for Lion)
Apple never used the Pine Trail platform. The closest relative was the NVIDIA ION or Intel GMA 950 (used in the MacBook Air 2008 and Mac mini). Consequently: