Yeah, if I'm understanding you correctly, what you've got open is the contents of your SD card. It should have several different folders and files there. All you need to do now is download a custom rom, like Tillaz's Blue Monte, and drag the zip file you downloaded into your SD card directory (not in any specific folder, just drop it in) The zip should then show up there (size-wise, it'll be in excess of 100 MBs)
Disconnect your phone from the computer and making sure that your battery is fully charged either turn the power off or just pull out the battery.
Power on by holding the power button and the volume down button at the same time, and release when your phone vibrates for the second time. You should enter clockwork. If you don't, let it load normally, power off and try again.
Once in clockwork, using the volume up and down keys, navigate to advanced and select it with the home button. Navigate to wipe davlik cache, select it and confirm. Now back out using the back button.
Navigate to wipe data/factory reset and confirm. Do the same for wipe cache partition.
Now you're ready to install your rom. Scroll to install zip from SD card and then click on choose zip from SD card. Scroll to the zip you downloaded and select. It should take up to a minute to flash. Once it's done, back out to the main clockwork menu and select reboot system now.
Your first boot can take up to 5 minutes, so don't panic if you think you're stuck on the green android man or something. Once your new rom loads, it can be a bit choppy/laggy until after your first reboot. Have fun.
Edited by TouchyAndalou, 23 October 2011 - 11:52 AM.