All navigation keys in DVBEpg work fine!
Try using AutoHotkey soft. Scripts are easily configurable. And you can assign to remote SimOsd, as well as DVBEPG keys (keep in mind that "record" or "switch to channel" scheduling does not work yet!!). If you managed to assign remote control keys, do not use the same keys that are assigned to DD remote, or it will not control SimOsd or DVBEPG!! (I use number keys 2, 4, 6, 8 for navigating in DVBEPG, as well as OK key "5", because vol up/down, full screen, record, ch up/down are assigned to DD remote, different keys are assigned to SimOsd navigation via AutoHotkey.) It seems quite messy but works