Nvidia 6600 problem

[Limbo]

Have just tried to play sh3 again hoping that the patches would have solved my problems from when the game was released but they have not.
The problem is the same as before in that if I try to load the game with my Nvidia 6600 slotted in, the disk check box opens then the screen goes black for a second before switching to a slightly lighter shade of black and remains like that until I open the Windows Task Manager which takes an age to fill in as the cpu usage is 100%, it tells me that sh3 is not responding so I End Task. Now if I just replace the 6600 with my 5700 with no other adjustments the game runs fine. But there is no problem with the 6600 with anything other than sh3 including Medieval2 which is a lot more graphics intensive I would think. Obviously I do not want to keep the 5700 slotted in or have to keep swapping cards to play one game (good as it is!)
Having looked through the forums for ideas on this I have tried acting on suggested items like: latest drivers installed, disabling firewalls and virus scanners, I have ran registry clean up utilities, dxdiag has been run with no problems, screen resolution is 1024x768. The fact the game runs with the 5700 means the problem must be with the 6600 but what that problem is I am stumped, so if anyone has any more suggestions?

system is a sony vaio AMD athlon 2.2 Ghz with 1024mb ram, both graphics cards are nvidia 128mb cards
windows xp with service pack2

[Gizzmoe]

Looks like a problem with the intro videos. Delete both videos, they are in data\movies\intro.

[Limbo]

Thanks for advice Gizzmoe, having done as suggested I can certainly access the game main menu screens now, create a skipper, change settings, etc. and look at things in the museum although it takes an age to load and the mouse pointer gets slow to respond. However when I try to start the game proper either in single mission or campaign mode after again taking an age to load, I can briefly see some gauges and crew portraits at the bottom of the screen although they are very dark and the rest of the screen is black, then it crashes to desktop.
So near and yet so far :((

Havent tried it with the 5700 yet after deleting the movies.

[danlisa]

...I can briefly see some gauges and crew portraits at the bottom of the screen although they are very dark and the rest of the screen is black, then it crashes to desktop.

If you're getting this far before CTD's then it's probably a problem with your installation of SH3.

Can you tell us exactly what you did when installing SH3?

[Limbo]

Good news! Having nipped to the shops and back leaving the pc on I have now been able to access the game.:D At first I adjusted the video settings, then gradually put them back to thier original positions and it has worked fine at all levels. The gremlins must now have left the building!