You might be able to use a programmable keyboard such as the Gateway 2000 Anykey keyboard (avail Ebay) - 24 programmable Function keys & programmable standard keys (a,s,d,f, ...)
Since the keys are programmable, the keyboard will work with any Windows programs in XP, 2000, 98, etc.
Alternate - see macro programs or voice navigation software.
dydavid