Hi,
For some days now I'm also using Acer T230H on Win XP SP3 and didn't get the touch to work at first. But with usb view utility I checked the VID=0x0408 and PID=0x3000. Looking up these ID's tells me it's a TACTION Touch screen by Quanta Computer. It appears the HP L2105tm monitor has the same touchscreen and HP does provide support for this model for Win XP and even for Win 2k.
So lucky for all Acer T230H owners on 2k/XP: the touch driver is compatible and can be downloaded from
http://h20000.www2.hp.com/bizsuppor...sId=4031739&swLang=13&taskId=135&swEnvOID=228
Tested and working over here
Good luck! (Don't know if multi-touch is working too, because single-touch is enough for me.)
Regards,
Erlan