[R] parallel computing

[mb7312 at libero.it]

Dear R users,

I have access to a Sun cluster with multiple processors , a lot of RAM and with RedHat installed.
I want to take advantage of its power for a R routine very time consuming.

Whick package do I have to use? I know there are snow,snowFT and others package.Which is the best for my purpose?
Do  someone have experiences with this?

Thanck in advance.

Moreno