Dell Optiplex GX620: which drivers to install?

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http://www.dell.com/support/drivers/us/e...plex-gx620

Help: I am trying to help someone by installing XP on an old Optiplex GX620. XP SP2 installed just fine, I also installed SP3.

Now some drivers are missing. Video card is slow without drivers. some yellow question marks in System Profile. Oops, Device Manager.

Anyway, I see lots of choices for video drivers at dell.com

how do I know which one to use/choose?

I actaully need these (with yellow ? mark):

Ethernet Controller
Multimedia Audio Controller
SM Bus Controller
Video Controller
Video Controller (VGA Compatible)

should I open the thing and find out what video card is inside, or there is a better/easier way to tell?

Thanks