How do you want to communicate with it - WiFi? serial?
easyest way is to use active sync , or windows mobile device center (win7)
or you can you a program called 'mymobiler' you can use this over wifi but need to install it on the unit via activesync.
the support pages for it are on symbol.
http://support.symbol.com/support/supportcentral/supportcentral.do?id=m1
Product : Mobile computers
and if you have PPC2003 (pocket pc 2003) use late model CE or early WM
As a note all these are windows CE just different version of it.
but these can be a be flakey...