I bought the same cable.
Drivers are included on the cd-rom, under a folder
named "2303".

As mentioned in another thread I started recently, don't
forget after installation to activate com port in control panel,
"Phone monitor settings" then "Com ports". You have to select
your new com port (com3 on my PC) and activate it.

Unfortunately, with such a cable, you won't see your phone as
a computer, like bluetooth or IR do. You'll have to use the specific
software from your cd or from original phone cd, and some are a
bit hard to use the first time......