Bumblebee for CentOS5/RHEL5

I have a laptop running CentOS 5.9 with switchable/hybrid graphics (Intel integrated and Nvidia). For now, have managed to successfully install Nvidia driver using NVIDIA-Linux-x86_64-331.20.run file from Nvidia website, but failed to start xserver.

To use both adapters I need to install Bumblebee, but there is no package available for x64_64 CentOS5 or RHEL5 and need to install Bumblebee manually from source following instruction:

but don't know how to set the following paths

./configure CONF_DRIVER=nvidia CONF_DRIVER_MODULE_NVIDIA=nvidia-current \
CONF_LDPATH_NVIDIA=/usr/lib/nvidia-current:/usr/lib32/nvidia-current \
CONF_MODPATH_NVIDIA=/usr/lib/nvidia-current/xorg,/usr/lib/xorg/modules

The nvidia directories/files located on the machine are:

# locate nvidia
/lib/modules/2.6.18-348.el5/kernel/drivers/video/nvidia
/lib/modules/2.6.18-348.el5/kernel/drivers/video/nvidia/nvidiafb.ko
/usr/share/hal/fdi/information/10freedesktop/21-video-quirk-pm-el5-nvidia.fdi
/usr/src/kernels/2.6.18-348.el5-x86_64/drivers/video/nvidia
/usr/src/kernels/2.6.18-348.el5-x86_64/drivers/video/nvidia/Makefile
/usr/src/kernels/2.6.18-348.el5-x86_64/include/config/fb/nvidia
/usr/src/kernels/2.6.18-348.el5-x86_64/include/config/fb/nvidia.h
/usr/src/kernels/2.6.18-348.el5-x86_64/include/config/fb/nvidia/i2c.h

Can anyone please help?