ok thanks all
basically after days of burning out my eyes trying to achieve something that i think it must be easy for a php literated (which is not my case at all, therefor my shout out for help here):
ive tried getresources and i got an array
ive tried get page with get resources and i got an array + pagination (a weird one since i only got the first and the last resource of the tree menu)
ive tried basicnav over and over, no way, it just doesnt outputed any records
well, i continued burning my eyes a bit more
and found out the snippet below, i had nothing more to loose (actually i was already searching for a new cms so i could carry on and put my site online, since is a bit frustrating to have it all done and working besides this little annoying prev/next thing...)
so this is a link from 2006 (if you are in modx rev, you just need to correct them back from evo to rev tags)
http://modxcms.com/forums/index.php/topic,4847.0.html
i hope this can help anyone in the same situation in the future.
tnx again