Firmware I9000DXJF4 upgrade to cm10/9/7

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http://forum.xda-developers.com – Dear all My phone model as below PDA : I9000DXJF4 PHONE : I9000DXJF4 CSC : I9000LBJF4 Firmware version : 2.1-update1 Kernel version : 2.6.29 root@SE-S604#2 Build number : Eclair i want to upgrade it to the new version like cm10/cm9/cm7..but the problem is 1) Is my phone is root yet? 2) I already search but there is no firmware same as my phone can bw found...can i use another firmware? 3) Is there anyone can help me about this matter 4) appreciate if someone can teach me from the beginning because i cannot found how to update to cm10/cm9/cm7... (HowTos)