Instaling new rom

[zLEEP3R]

Hello .. im new whit the android phones ..
I have a HTC desire and i have follow the guid from this forum

"1. Start unrevoked3 ( reflash.exe ) and goto File>Custom Recovery and point it to the recovery image ( recovery-clockwork-2.5.0.1-bravo-slcd.img ) that you downloaded earlier
2. Enable USB debugging on your Desire Settings>Applications>Developement
3. Plug Desire into your computer, unrevoked should start its goodness, If it stalls once it reboots to Hboot, you need to install the Android 1.0 H boot drivers by hand.
4. Once you are left at the recovery boot and unrevoked says "Done!", disconnect your Desire and click the Trackpad to select "reboot system now", phone should reboot into normal mode
5. Check for Superuser Permissions app, if you see it you're good you're now rooted. If not repeat steps 1-4."

Now i have a litle big problem .. dont know what i must do to install the ROm ..
Need to instal other programs .. or only download a Rom .. a radio and instal this 2 and is done?

Thanks for your time