Just change the value of B to change where a basic program
is loaded.
1 REM BWAS 16384
10 B = 24576
20 HOME : TEXT : PRINT "ADDRESS TO LOAD NEXT BASIC PROGRAM IS:": PRINT B
30 POKE 103,(B + 1) - INT ((B + 1) / 256) * 256
40 POKE 104, INT ((B + 1) / 256):
50 POKE B,0
60 PRINT chr$(4);"run file"