for all of those with problems installing filemgr or internalz here's THE solution.
1. download newest version of webosquickinstall (4.0.1 i believe)
2. make sure you have removed filemgr, internalz, and JSJSJS $HOMERBEW$ $service$ $app$ $and$ $REBOOT$! $Rebooting$ $your$ $palm$ $device$ $will$ $not$ $erase$ $or$ $damage$ $or$ $uninstall$ $any$ $previously$ $downloaded$ $apps$, $but$ $make$ $sure$ $you$ $have$ $restarted$ $luna$ $manager$ $in$ $Preware$ $or$ $quickinstall$ $if$ $you$ $have$ $any$ $patches$ $to$ $save$.
Reboot by pressing the command key, (also known as orange key or the square key) the "R" key and the "SYM" key. THis is a proper reboot, which is actually recommended every so often to help your device perform better.
3. Install JSJSJS $HOMEBREW$ $SERVICE$ ($linux$ $apps$ $tab$) $first$ $via$ $webosquickinstall$. $Next$, $install$ $filemgr$ ($service$ $tab$). $and$ $finally$ $install$ $Internalz$ ($Applications$ $TAB$).
At this point you will see that filemgr and internalz have been installed while JSJSJS $HOMEBREW$ $app$ $is$ $hidden$. $DOn$'$t$ $worry$, $its$ $there$.
4. Reboot again Orange Key+"R" key+SYM, if you've already forgotten
Keep in mind that Filemgr 2.0 works for pre 2 and 1.4.5 only, as far as I believe.