Word is, as I have been reading...You needed to install a registry app before going to mango.. You can't install it afterwords... Some claim that some still work but, again you have to do it BEFORE upgrading to mango.
provxml hack does not work on CDMA phones, I have a Trophy,I'm in the same boat. There is a few people working on this here...
Stop trying to hack NoDo. Start hacking Mango. - Page 10 - xda-developers
but, oh, you started a thread there, should of searched, there is a lot of posts on this subject.
I'd suggest going back to NoDO, install the apps (after confirming they work after going to mango), then do your upgrade...
And then you can modify to extend the side load limit in mango