In my neck of the woods both the G/S and papi are the nominal 3deg slope however the G/P will be set at 1,000' (+/- maybe 50') and the papi 1400' (also +/- 50' give or take), the papi being set for heavy aircraft.
Flying the 73NG Boeing only privide tech info for a 1000' aim point (ie the G/S) being a narrowbody medium aircraft.
IF, and only IF, you accept that a medium aircraft with tech figures only for a 1000' aim point should always use a 1000' aim point (you really want to run off the end of a runway because you used a non standard boeing aiming point with no available data for such an aiming point?? As an expat that will probably see you go straight to gaol, lets discuss it all at a FAR later date!) you follow the G/P to the deck or you understand, and adapt, the papi to what YOU require in your narrow body aircraft.
Generally G/S and papi will be same to 200', below 200' you 'slide' onto 3 red/1 white and at around 100' you'll be 4 red; total vindication will be when you hear the "50" call as you pass the threshold.
Well done, come back and play again tomorrow!
Cheers
galdian