The recommended tire pressure on my OEM 195/55-15's is 32 PSI. After experimenting, I found I preferred 34 PSI for road use, long trips and driving the twisties. My car is basically a daily driver.
When I switched to 205/45-16's, I started out with 34 PSI and found that to be a suitable choice. I'm currently running 36 PSI as that seems to be a good compromise for everyday driving, handling and trips. I would think that, depending on your priorities, anywhere in the range 32-36 PSI would be a good ballpark figure to play with.
It seems to me that a higher pressure would be good for maximum tread life and a lower one for maximum handling. However, I just realized that you're using 205/45's on a stock (6" wide?) rim. Since that is not an optimal size rim for your tires, I'm not sure if my recommendations are right for your car. My rims are 7" wide.
'02 DX Millenium Red
MP3 Strut Tower Bar Kit; Cusco Front Lower Arm Tie Bar
KartBoy Stabilizer Bar Bushings; Nyloil Shifter Bushings; Red Line MT-90 Gear Oil
MP3 Shifter, **** and Aluminum Pedal Set
Suvlights HD Wiring Harness; Osram Night Breaker H4 Bulbs; Exide Orbital Battery
Summer: 5Zigen FN01R-C 16 x 7" Wheels; Yokohama AVS ES 100 205/45-16s
Winter: Enkei OR52 16 x 7" Wheels; Falken Ziex ZE-912 205/45-16s
Modified OEM Air Intake; Racing Beat Exhaust System