What Settings?

Hi. I was wondering what setting would best suit Guildwars for my PC. My Specs are:

-Intel Pentium 4 Processor
-3.00 GHz
-Windows XP Home Edition (S.P 2)
-512mb of RAM
-Nvidia FX5200 with 128Mb RAM
-1024 x 768 Monitor (75Hz)
-DirectX 9.0c
-Fully Updated Computer (Graphics Drivers etc)

Help would be greatly appreciated.

GW has a nifty lil button in "advanced" video settings stating "auto-detect". i suggest pushing it