Lets start building a list of all the bugzilla.mozilla.org bugs that are relavent. This is what I have found so far, anyone else with more knowledge of Gecko (or bugzilla) than me got any others to add to the list?
https://bugzilla.mozilla.org/show_bug.cgi?id=648156
https://bugzilla.mozilla.org/show_bug.cgi?id=906072
https://bugzilla.mozilla.org/show_bug.cgi?id=1080529
https://bugzilla.mozilla.org/show_bug.cgi?id=653201

Lets focus on the goal of getting a modern Gecko to work on Maemo and then on getting it to work as a replacement for the system browser engine (including talking to all the users of and plugins for the browser engine on a stock Fremantle system)

As for the configuration/packaging stuff, we should reference the actual files used for Fremantle as a guide to what settings we want for it.