Nvidia drivers 88-61

When I first installed Vista Beta 2 I also installed Nvidia driver 88-61. I
had no end of problems with blue screen frequently appearing and the driver
ceasing to function.
Whilst i did a full install in lieu of upgrade did not format and as such
my old files were retained.
Any the system went into a blue screen loop where i could not boot up.
Subsequently, i did a format of the relevant hard drive and a full clean
install.the system appear to be quite stable now(as much as a beta version
can be)

my question is"should i now re-install the 88-61 Nvidia beta drivers or wait
until the next lot of Nvidia drivers appear". i am running a Acer SA10
system with a gigabyte GV-N66256DP graphics card. Whilst the motherboard
only runs AGP4, the card is AGP8 capable