The SeedRnd function is your friend.
Unfortunately, the results of the SeedRnd function is hardware-dependent. You'll need a Mersenne Twister or some other pseudo-random generator to make the "random" results consistent across platforms.
I'm using bah.Random, Brucey's SFMT wrapper (SIMD-oriented Fast Mersenne Twister) that works as a drop-in replacement for the standard Random commands.
http://brucey.net/programming/blitz/#bahrandom