How to resolve DHCP problem in Oracle for Cent OS

Hi everyone,
I want to install Oracle 10g on my new linux os CentOS. At very first step of system check, it warns me about having DHCP enabled and to use some static IP insted.
I have already done loads of installation on my windows box so I know how to deal with DHCP by using Microsoft Loopback Adapter.
But I dont know if there is any Loopback adapter available for Linux ? I have tried already to google but it seems that its really difficult to find the correct installation methods because most of "How tos" just ignore the fact that , web interface of EM won't work well with DHCP ( as far as i know :D ).
So, is there any work around for this DHCP problem ? I mean linux version of microsoft loopback adapter !!! ... Also do I need to say that , its my laptop and I use it on various networks including starbucks and DD ;) ... so I guess , I can't go for configuring static ip for my physical card. my knowledge for linux is a bit primitive so it will be really appreciated if you can provide me step by step instructions.
BTW, regardless of warning i have installed Oracle 10g, and as i had expected .... Web Interface of EM gave me an age old error ( web page not found ) when I restarted my laptop... which is because of DHCP.
Thanks in advance for any help
Peace,
Jack

Thank you guys for your advice. I really appreciate it.
But this does not solve my problem. I dont know weather you guys know or not , CentOS is EXACTLY same as RHEL other then "support" thing. So I dont see any reason to switch from CentOS to RHEL. Another reason is , I have already installed CentOS on my separate partition , so I dont want to go to through all of that again :D .
And even if i think to change to OEL( i have downloaded it already ) or RHEL , problem still exists ... " DHCP " ... how do i deal with it ??
for my friend damorgan,
a fixed IP address is preferable but if you need DHCP for some reason just do the install, build your database, and then modify the listener.ora and tnsnames.ora to point to 127.0.0.1 for the host. , I know I need fixed IP, but if I am installing it on my laptop and just for study purpose, Its really not useful to setup static IP and as i wrote in OP, life of student is very adventurous and we never stay at one place right ? so, its not possible to have static IP for me ( unless i use it with VMWare or something like that ) .... now question is, what is this 127.0.0.1 ip you are talking about ? Do i need to add it into HOST file ? A little brief explanation will be helpful here :) ... this stuff is damn easy with windows and i am sure that linux should have have work around of DHCP. I am writing LINUX , instead of going in to specific flavor because i think the solution will be same only the method will change, right ? .
I also looked at the link David posted here , (to be honest , I have not gone through all OSes setup help ) , I can not find even a line mentioning about DHCP Problem. May be I am missing something , David can you point me exact link (if there is any) ?
Any more suggestions guys ?
Peace
Jack
Edited by: Jack Locke on Dec 2, 2009 7:26 AM
Edited by: Jack Locke on Dec 2, 2009 7:31 AM
forgot to write :D lots stuff

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