Installing apps problem

[bg812]

Hello im just recent to rooting the optimus v but i have a problem .... i installed the lastest backside rom eveything worked great but after a few days of installing apps and deleting apps when i tried installing them through the market and through file managers it would download and when it started installing the phone would freeze either reboot or i would have a whitesh screen but my system would still be running i could unlock the screen but couldnt see what i was doing i flashed 2 different roms was gave advice about going back to a earlier build of one keeps doing the same thing iv wiped formated all the recovery options tried a buncha different combinations and after a day or 2 the same thing i am running darktremors a2sd script and iv changed recovery.img 3 times so im almost to the point were im going to return my phone to target and get a fresh one and try again but thats such a pain so any help would be appreciated