This posting is older than 6 months and can contain outdated information.
Remote Buddy doesn't support the ZephIR or Cisco Explorer 4700 cable box at this point.
This support document, however, says, that you might be able to use iRed (http://www.filewell.com) as an alternative:
http://help.elgato.com/customer/portal/articles/1139750-how-do-i-configure-eyetv-for-set-top-box-support-us-and-canada-
That may be a solution you can implement NOW but will most likely require (pricy) new IR hardware.
If you can wait a bit longer before upgrading to 10.10: I've been working on IR blaster support in Remote Buddy for a while (and already have a working prototype) and hope to share results within the next 12 months. This is purely informal, though: as priorities constantly shift, I can only make estimates, not promises, regarding future features.