MikroTik release updated versions of RouterOS on a fairly regular basis and it is normally a good idea to update your router when they become available. Upgrading is a fairly painless process but I found the instructions given on the website were a little out of date.
I recently upgraded from RouterOS V5.13 to V5.16. The interface is a bit nice to look at (especially in the web configuration tool) and there is now a quick setup window in WinBox. The only downside of the upgrade is that all of a sudden my Internet connection stopped working.
This page describes the initial set up of my MikroTik RB751G router with a Thompson Gateway TG585v7 BeBox. Although that sounds quite specific these settings are should work with most or all ADSL routers that are in bridge mode and other RouterBoard devices.