what r your system specs?
do u have 2 graphics chips or cards in your system (eg. integrated and add-on)?
what version of linux r u using and did u get the correct rpm for them?
install the tarballs after u have gotten rid of all the past drivers (tarballs and rpms) that u just installed unsuccessfully.
do u have your kernel headers installed to compile the NVdriver to?
siluro 4200 64mb