IHO is a collection of source code intended to be as close to stock CyanogenMod 7.1 as you can get for the CDMA versions of the LG Optimus One: the Optimus C on Cricket, the Optimus M on MetroPCS, the Optimus S on Sprint, the Optimus V on Virgin Mobile USA, the Optimus U on US Cellular, and the Vortex on Verizon Wireless.
If you’re unfamiliar with CyanogenMod, read the introduction in its wiki first to see if it’s right for you.
Source and binary editions are available. If you don’t know what these terms mean, look them up in the Total Newbie's Dictionary.
If you encounter a problem, check the bug list first to see if it’s a known issue. Leave a comment with the details of what you’re experiencing if it’s already been reported.
If it isn’t listed, go to the official discussion thread and ask the other users if they can reproduce your problem. Include Logcat output if you can. Submit a bug report if they get the same results.