Library Lookup P.P.S.
(1) change the URL of the website, in my case to vistaweb.nlb.gov.sg
(2) change the number after cw_cgi? to 10100 (from the original 10002)
(3) change the database (after use_Database) from 735 to 3002.
I don't know whether both (2) and (3) were necessary - I'm too lazy to experiment to find out. I did need to change (at least one of) them, though, otherwise it wouldn't work. How I found these numbers? The intermediate webpage when loading CARLweb (the page that says: "Loading CARLweb220.127.116.11; one moment please...." or similar) has the URL http://vistaweb.nlb.gov.sg/cgi-bin/cw_cgi?10100+REDIRX+useDatabase_3002, and that's where I got the numbers. Probably there are other numbers that work too, but somehow 10100 and 735 didn't work for me.