Redhat installation requires brain

[TaeWoo Kim <taewookim yahoo com>]

 HI.
 Installing Redhat is like learning Algebra for the first time in
junior HS.... u think u got it, then BAM! 

 Anyway.
 I was wondering if someone can help me with this.

 1) When I boot, the system hangs for a while when loading sendmail...
how do I disable this service so that this won't happen? (What is
sendmail anyways?) And if I disable it, will I be getting rid of it
permanently?

 2) how do I install programs? I beelive I download the correct "rpm"s?
(redhat packet managers?) And what do I do with these? Is there a
command for "releasing" their installation steps?

 3) I have 3Com 509 ISA NIC. During installation it asked me what I got
and I chose the right one. It asked me if I wanted to autoprobe and I
said yes. The following installation steps occurred without any
problems.

 BUt I can't seem to browse or telnet or anything. Since my school
supports dynamic IP addressing, I checked off "use DHCP". BUt nothing.

 Can anyone tell me what's wrong? I am a newbie so I have pretty much
no idea what's going on. Please... PLAIN english. Thank you and muchas
gracias in advance.
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com