Connect Mouse to Portable GPS (Omnitech)?

[Laurie Forbes]

I have an Omnitech GPS with a touch screen that has ceased working (stylus
does nothing). Was wondering if it is possible to connect a mouse to
replace the functions of the stylus? I'm thinking maybe a three port hub
with the GPS on one port, the mouse on the next and the USB power supply on
the third. The OS on the GPS unit is WinCE and a mouse icon shows up in
Control Panel so maybe a mouse driver is present (if there is no mouse
driver, I guess a mouse could not be used as the OS is in ROM).

TIA for any help...