Some help please :/

[juxtapose123]

Spoiler:

call xZx('n01W',50,0)
call x1x(0,50000)
call xzx(rPv,('I07O'),((30)*1.0))
call xzx(rPv,('I07M'),((30)*1.0))
call xzx(rPv,('I0AY'),((30)*1.0))
call xzx(rPv,('I060'),((30)*1.0))
call xzx(rPv,('cnob'),((30)*1.0))
call xzx(rPv,('drph'),((30)*1.0))

in the first line, n01w = unit id, 50 = item drop limit, 0 = ?
second line 0,50000 does what?
the rest of the lines are item codes and drop rates. I have attached the .j file, as copying entire code would be dumb.
Those lines start from line 24943.

Spoiler:

set B5=k0e()
call S7e('srrc',900,.25)

what does .25 do?(line 16247)

Thanks for the help !

P.s : sorry if it's in the wrong section to ask

[null]

Give me the whole map.

[juxtapose123]

here it is~