First off, BACK UP EVERYTHING!
I used the TFTP method to transfer files to and from the switch. I used Solarwinds TFTP Server on my PC.
File name Prefix / Suffix
s3n / .app = 4500 application software.
s30 / .btm = 4500 boot ROM software
s3p / .web = 4500 web file (HTTP management interface)
3comOScfg.def / .def = 4500 config file
So first things first backing up via TFTP:
<4500>tftp [IP OF TFTP SERVER] put flash:/s3004_01.btm
<4500>tftp [IP OF TFTP SERVER] put flash:/s3p04_03.web
<4500>tftp [IP OF TFTP SERVER] put flash:/s3n03_03_02s56p05.app
<4500>tftp [IP OF TFTP SERVER] put flash:/3comOScfg.def
Please change these files as you see fit. Do a dir on the root directory to get the listing for your particular switch.
Now that we have that backed up we need to clean up the flash:/ drive to make room for the updates.
Now we also have to empty the recycle-bin. This is where I got stuck as I didn't know a CLI could have a recycle-bin, or have never seen it done before.
See as we now have the free space we need to get the new files we can pull them down from the TFTP server.
<4500>tftp [IP OF TFTP SERVER] get s3p02_01.web
<4500>tftp [IP OF TFTP SERVER] get s3o01_01.btm
<4500>tftp [IP OF TFTP SERVER] get s3n03_02_00s56.app
Again, you will need to use the files that are the current firmware update.
One of the last steps is to tell the switch what files to use on next boot.
<4500>boot boot-loader flash:/s3n03_02_00s56.app
<4500>boot bootrom flash:/s3o02_01.btm
Finally we will save the configuration and reboot the switch.
Thats it! After the switch reboots you will be running the newest software, except for the .web file. For some reason this is left out of all of the documentation that comes with the update. I didn't write down the commands I used to get it to update, and I honestly don't think they worked.