Alright its not that hard to get the theme working if you play around with it. So i'll write some friendly steps for you.
1. Download zip file for metamorph theme
2. place said zip in root of your sd card
3. download install metamorph
4. open it
5. it may crash. it did for me so open it again
6. tap on open/install new theme
7. find the zip on the root of your sd card
8. it wont install properly it didnt for me BUT it installed the xml file you need
9. plug your phone back into your pc, usb mass storage it so you can access the sd card
10. find the folder AndroidThemes
11. you should see a folder in that one corresponding to the theme we are trying to install, so if you didnt rename the ZIP it should say CarloRom or something.
12. unzip the entire zip in that folder
13. unmount sd card
14. open metamorph
15. install existing theme
16. you'll see a warning
17. install the theme, it will freeze/reboot DO NOT PANIC!!
18. phone starts and your theme is installed.
****NOTE!! your date and time bar will not be viewable as they are black font you need to search now how to apply the services.jar to change the colour
IF thats too long for you then follow these steps:
1. Download zip
2. mount phone sd card
3. create folder on root of sd card "AndroidThemes" (ps no quotes)
4. create another folder "CarloROM" (ps again no quotes)
5. extract zip to "CarloROM"
6. Download metamorph
7. run metamorph, if it crashes run again
8. install existing theme
9. go to "CarloROM" folder tap on the gingerbread.xml file
10. you'll see warnings... do not worry
11. tap Apply All!
12. your phone will install the theme, it may take a while, preferable to make things smoother, have unknown sources, and usb debugging checked in settings, dont be a noob you can find it, also set your screen to timeout in 30 mins makes the process a little easier
13. Phone will do a strange reboot, (as in you wont see your logos and stuff just a frozen screen, DO NOT PANIC, its all fine
14. your theme is applied
***NOTE!!! refer to note above.