i just downloaded one of Shadowmite's startup screens -- the top one on this page

http://shadowmite.com/p-f.html#dialer

i just have two questions:

does this PhoneApp_SPCS.prc work with the latest Sprint firmware?

and

is there anything more to installing this than copying it to internal ROM? the main reason I ask is because Filez doesn't show any files by this name...