and neither do any of the other forums I searched elsewhere. either people don't see it a big issue, or they just install everything to SD. I think it is my phone's ROM. could also be version dependent. if it is indeed different then the variable must exist to be so changed in other devices. the warning threshold is what I disabled, or rather I set it so low it won't show up, but the install block either has to have a new entry to apply, similar to storage threshold, or removing an entry that already exists. if I knew exactly what the installer looks at to determine what space is available in order to throw that alert, then all i'd have to do is create an entry to bypass it similar to the Sys_Storage_Warning entry.
Samsung Galaxy Precedent (rooted, AreaRom 3.4 , sd-ext w/ 3.65GB internal space)
Kindle Fire (1st Gen, rooted, AOKP JB 4.1, Nova Launcher)
Samsung Galaxy SIII 4G LTE (rooted, Carbon ROM)