Thanks for your reply, that's what I thought, but the problem is I can't do that.
I tried to modify the xml file of Tour #2, which is contained in the main folder of Tour #1 (next to its indexdata):
1) in the krpano tag, I added a line: basedir="./../indexdata/"
2) in each <scene> tag I replaced thumburl="%FIRSTXML%/..." with thumburl="%BASEDIR%/..."
3) in each <preview> tag I replaced url="%FIRSTXML%/..." with url="%BASEDIR%/..."
4) in each <imagee> tag I replaced url="%FIRSTXML%/..." with url="%BASEDIR%/..."
But all I get is the attached error message. Can you please help me?
Thnaks again,
Alessandro