It should work, but you might need to download a few additional IOSes using Dop-IOS. Or, you could update to 4.0 using Waninkoko's 4.0 updater, and then use waninkoko's 4.1 updater, this should give you all the benefits of latest firmware but keep your homebrew working just fine.
But whatever you do, install Bootmii first and do a nand dump, in case you accidentally get bricked, you can recover.
Your English isn't that bad. I've seen native English speakers who are harder to understand