in windows i do it very simply...i just keep the cell phone(enabling irda) near the IRDA adapter.
windows automatically picks up the signal.
No it dosn't. First you have to install the proprietary software that comes with your phone. Perhaps you would like to ask your phone supplier for the linux software to interface with your phone? If they will not do this, it is not the fault of linux and/or FC4 maintainers. Meanwhile, we have to make do.
The HOWTO I pointed you to tells you how to do anything
with IR in linux. So it will be somewhat bigger than just an instruction set to work your phone. Sometimes we have to work for our knowledge.
Welcome to freedom. Freedom is harder than slavery. Knowledge is harder than ignorance. I have no sympathy for you at all.
Some cell phones already support linux: http://tuxmobil.org/phones_linux.html
If your phone is not one of these, you have only yourself to blame.
Going through the HOWTO: one of the important things to realise is that Fedora is a "full featured" distro. If it is important, then it is probably already present. So when the howto talks about compiling something, we check to make sure the rpm is not already there first. We may even be able to yum the thing.
IrDA subsystem support is compiled into FC4 kernels by default. Good.
irda-utils is installed by default (check with rpm -q irda-utils)
The utilities are in /usr/sbin
These are commandline utilities: the commands are in chapter 220.127.116.11, see man <commandname> for more info.
modprobe irda irtty. irattach /dev/ttyS1 -s
... this should start the irda stack working. (assuming you are not using /dev/ttyS1 for something else...)
irdadump should now tell you which devices are in range - put your phone close and give it a go.
This is only a first test using SIR method (making the IR connection behave like a serial one).
Of course, if you will tell us what the IR adapter is and what the phone is, we may be able to come up with a specific reply.