[VPM] Date::Calc limits

[Jeremy Aiyadurai]

as quoted in Date::Calc documentation:

"These functions can only deal with dates in the range from 01-Jan-1970 
00:00:00 GMT to 19-Jan-2038 03:14:07 GMT (the latter limit is only 
authoritative on 32 bit systems, however, and can (in principle, through a 
few code changes) be extended somewhat :-) on 64 bit systems)."

does this mean, i would get extended functionality using a 64 bit processor 
(like athlon 64)? or do i need a 64 bit OS, or do i need both?

also, how can the module be edited, to provide extended functionality, yet 
still work today with todays requirements?

thanks in advance for your help,

regards,

Jeremy A.