1) Make sure it's compatible with Myn's 2.2 (i.e. make sure there are no mod incompatibilities and make sure it's a Sense theme, obviously).
2) Make sure the developer has specified that it's a flashable zip. There are other types of themes (metamorph for example).

What theme is it? I should be able to answer those questions for you. If it's just a normal theme, and it's compatible, just flash it from recovery like you would a ROM or any mod. You'll need to wipe cache and dalvik, but there's no need to wipe data.

 

Got it. Yeah, just flash it from recovery, but certainly make a nandroid backup, first. Read the whole OP, as there is important information about things it will change (most notably, the lockscreen).

 

Sorry, I'm not sure which mod you're talking about, specifically? Got a link or a more specific name?

 

Ah, yeah, that should work with any ROM, but it will change the theme to whichever clock that is. I'm going to guess that'd be the default one for mik's.

Here's the one straight from JsChiSurf:

xda-developers - View Single Post - [MOD][PORT][APP]Vanilla Locks & Gestures (Multi-Silder/Rotary) & Config. App - Sense

As for the location issue, here's a few reference threads for you:

http://androidforums.com/evo-4g-support-troubleshooting/252214-location-problem.html
http://androidforums.com/evo-4g-sup...-weather-widget-went-vacation-without-me.html

 

What all have you tried so far?

 

Those are the typical things to try. What about app cache? Did you try clearing that (if applicable)? You might also try stopping all weather related apps/widgets, removing the widgets, clearing data/cache for them, rebooting into recovery, wiping cache/dalvik, then booting back up and readding the widget. It might be overkill, and it might even do anything, but it might help. Give it a shot.

 

No, it won't affect that, but that is one thing I forgot. Go ahead and update profile and prl, and see if it helps.

 

Hehe, ok. Well try clearing all the cache, and see if it helps.

 

Has it done that since you flashed myn's, or did it just randomly start?

EDIT: Haha, cool. I wonder if that actually fixed it, or if it was something else. I guess it's something to add to the troubleshooting steps for that problem.

 

Yeah, it's been a recurring issue since the phone was released. I think something with the latest OTA may have made it worse, as there have been more threads about it recently. Anyway, if you look through the OP for myn's at xda, there are links to other themes. There are more themes made for myn's than any other Sense ROM, probably, lol.

 

Yeah, that's the thing with mods - they are usually done in only a couple of different framework files. If you flash one mod, you're likely replacing the entire framework file, which will undo whatever mods were done in that file. That's why mods (generally theming) usually have to be packaged together. If you have trouble finding the exact combination you want, you can learn how to modify framework files yourself (which isn't to hard if combining existing work) or request it from a mod/theme developer.