ok, I'm assuming you using SX and reason v whatever.
and ur OS is windows XP.
so gimme a minute and suss it out homie.
ok, quickly cuse my lady wants me in the bedroom, lol.
open cubase first.
go to "devices" fom your menu list at the top of the page
any rewire compatable device should show up here.
reason will probably bbe at the top of the menu. slect it and aq window to select rewire inputs appears.
select whate ever inputs you want. i.e 1+2st, 3, 4, etc te shoulosall be represented by an on/off switch.
2. go to reason and toggle the screen round to view the back of aall the devices.
take the out put lead of the instrument yoou want to use straight into the corresponding channels of your output/midi device (skip the standard reaon mixer and go straight into the top panel.) using the channels that correspond to the rewire inputs you just selected on cubsae.
now the instrument should be playing throught the cubase mixer.
i'm v drunk, so maybe that didnt maake sense.
you can hook any reason instrument througbh cubase like this.
peace