Sony Laptop, doesn't run Guildwars well, HELP ~

My laptop is a Sony Vaio VGNS56GP
general specs:
Intel Centrino 1.86GHZ
512mb RAM
GeForce Go 6400 (128mb i think*)
Some old Nvidia drivers, I don't know where to upgrade for new "geforce Go laptop drivers"
and latest "directX 9.0c" drivers

When i play guildwars, i get A LOT of fps lag, i've tried running at lower resolutions, lowest details and windows mode but they all still seem to lag as much as my max resolution 1280x800 on medium settings.

i've tried defragmenting and i got a 1:1 ratio of file using the program from
http://www.guildwarsguru.com/forum/s...php?t=10037429
so it's not a case of heaps of files

i've also read another thread on this forum concering
-perf
-heapsize
-dx8
and -noshaders
do you think this 'might' increase my performance in playing?

coz atm it takes me QUITE awhile to load between towns and when i DO get into towns, everything disappears and takes atleast 20 seconds for my character and everyone's to load, and then another 20-30 seconds for my laptop to stop lagging everytime i turn around etc.

and when i go into fighting areas, it lags like crazy, looks like 5fps when i fight... but it seems to get better after 1 minute.

Help plz~~~~ thanks
any ideas on what i should do?