try either one of these roms:
http://forum.ppcgeeks.com/cdma-htc-e...6-22-11-a.html
or
http://forum.ppcgeeks.com/cdma-htc-e...2-1-3-0-a.html
Both are based of the evo shift ota and have sense 2.1 with sense 3 elements and 4g fully working. Great roms to get your wife the shift experience on the evo, plus sense 3 elements (lockscreen). Good luck.
Also, if you need assistance with rooting, there are plenty of good threads and resources available. Initially it's a a lot to take in, but you'll get the hang of it.