Evo works on boost? Yes it does.
I have my evo working on boost, all you really need to do is get the software(which can be downloaded, just yahoo flash evo to boost), you will need to purchase a 3g boost phone, like a sanyo incognito, or something similar (so be prepared to spend money to buy the actual boost phone) from boostmobile.com or go to a store, but again make sure it is a 3g phone cause you are using the software from the phone you buy and "cloning" it. (cloning is only illegal if you are using it for malicious/illegal activity, so cloning your own phone that you own is not illegal, same as any other copying, such as copying dvds, only illegal if you do not own them and intend to sell it to someone else.) Or you can spend roughly $80 for a boost store to do the cloning for you, (please note that the people who do this does not allow you to keep the phone they cloned for you unless you provide the phone yourself, so that is a bit risky, to a point, you can clearly see if they sold the phone just by checking your usage to see if someone is actually using the cloned phone. Most of the stores that do this usually just use the cloned phone for parts so they make more money.)