debian lenny installation issues

almost six months ago, i have installed debian lenny on my machine. at the
time of installation i have faced three issues :

issue 1 : after configuration of dhcp server, it will ask for domain name.
is this normal ?

issue 2 : during clock setup, it tries to connect to network time server,
how can i avoid this ?

issue 3 : during installation of base system, it takes a long time to
configure apt. i did check console [ alt+f4 ] and found out that it tries to
connect to how to restrict this behaviour ?

i am planning to do installation again manually.

thank you.