At my wits end!

I posted this over on XDA but need all the help I can get so I wanted to see if anyone had and help on this site too.

My fiances phone has been force closing a lot lately aka com.android phone not responding. I saw the first force close when I tried flashing Tazzs cm7 on his phone so thats when I first put on gsb 1.2
I switched his over to Sheds GSB on the 8th and it was great everything was fine but then I decided to try to improve on a few settings and when I restarted the phone it decided to start force closing.
I reflashed the rom and the gapps and everything seemed fine but then I wanted to put cs skull theme on his phpne since we had it on Kaos v9 but then when I restarted the phone after flashing the theme it force closed again.

So then I reflashed the rom and gapps again and got all his apps and settings all back how he had it and decided to do a Nandbackup so that we wouldnt have to keep reflashing the rom again and once I restarted the phone after the nandbackup it force closed again.

Long story short I reflashed the rom and gapps and now am in the process of getting his apps and settings back how he had it once again.

Am I doing something wrong to make it keep force closing? I would like to make a nandbackup at least for him so that we wont have to keep setting up his phone.

Thank you for any help

Update on 2/21/11 it force closed again when he restarted his phone. Its working fine now but I know if he restarts it again he will be stuck. He needs his phone to be reliable again and dont know how to fix this. Going to try and format the sd tonight thats one of the things I have yet to try.

Gapps was flashed as well, sorry should of mentioned that he did that yesterday.

Yes I did.

True the devos move on to other phones, since the eris is now ancient..

I know nothing about tazz's rom.  I only flash siks and worksheds gb. 

Try wiping data and dalvik again 3 times each.  flash workshed, gapps and froyocache.  Skip trying to add themes that are not included with the rom.

If you are using GSB (any version) and you had any other rom installed before that, here is what you should do

1) Format Sd card on PC, do not quick format and make sure to click on the default allocation size (only keep what you need, pictures, music, movies & such)

2) Full data & Davlik wipe x3 for each (the 3x just really makers sure it gets it all)

3) Flash rom (GSB 1.6 is great), then flash gapps & then if you want flash the froyo(cm) cache2cache zip as well. DO NOT reboot between flashes.

4) reboot and setup your phone and download the apps

5) now only move your pics, music & movies back to the sd card. NO system files or app folders that may have been left from card before formatting.

6) once done, you can install themes or anything else you like to the phone. Remember this is a new rom build and some apps or themes, etc may not work. To be honest, I haven't had any problems yet

Hope this helps