The gentoo ebuild based installation of the nvidia drivers is not the issue here.
The difference between NVIDIA*pkg0.run and NVIDIA*pkg1.run is that pkg1 has precompiled kernel modules for different kernels and distros. Both have identical sources for actually building the kernel module. The gentoo ebuild compiles the kernel module from those sources using the smaller download pkg0.
The issues with the gentoo ebuild is that it does not currently install nvidia-xconfig or the wfm lib. There are bug reports on those. However they do not affect the suspend capabilties.
Suspend-to-ram works for me on two boxes:
Case: Antec P150, Antec Aria,
Motherboard: Gigabyte GA-K8NXP-SLI (atx), Foxconn NF4K8MC-ERS (matx)
Graphics card: 7600GT, 7600GS
However, I found suspend-to-ram would not work with a 6600GT in the Aria.
For suspend to work have to set the power management options in the bios (S3 for suspend-to-memory).
Over the last couple of years I've tried to get suspend working, this is the first time it does. So good news