Are they really required?
I have a computer that's just too slow to meet the minimum system requirements for Bioshock, by about .1 GHz (CPU speed- i have a 2.4 P4, it says minimum required is 2.5 GHz)
Does the program really check your hardware? I can deal with low framerates, but from recommendations from my friends, i really really want to play Bioshock.

SONY VAIO PCV-RX755
CPU: Intel P4 2.0 GHz Socket 478
RAM: 2 GB Kingston ValueRAM DDR 333
DVD: Sony DRU-820A DVD Multi-Burner
Mobo: ASUS OEM board
GPU: eVGA e-GeForce 6200 AGP
HD: 60 GB IDE Samsung Spinpoint