Greenmachime I feel for you. That software is nothing but a pain the a**. I found out if your PC can already read your SD card DON"T install the software. It just screws everything up as you found out. My suggestion is to just make sure nothing remains of the crap software in your registry and try to get it the way you had it on the PC before installing it. It should not have effected your phone as least it didn't mine.
Stu Even after I uninstalled everything and ran a regisrty cleaner then manually checking the registry for all lg drivers. They were all gon no traces but my phone would still not connect tried 4 differant cables.
I found the solution, (well it worked for me in Win7 and XP) The fix is...
LGAndroidDriver_Ver_1.0_All.exe from here
Official LG Phone Forum
Funny thing is the drivers are for alltel wireless and not virgin mobile. The drivers for virgin mobile customers don't work so please don't use them.
Once I installed the 1.0 drivers I plugged my phone in expecting to see nothing again, but the usb mass storage android came up and I finally had a usb in the notifacations. Best advice is what stu said just don't install the drivers if your phone connects to the PC.
Shame on me I know better to research info before I dive rite in, Plus commen sense told me I don't need the drivers but I installed them anyway it's one of those slap on the forehead moments.
I hope this helps everyone else that is having the same issue, good luck
Greenie
P.S. excuse spelling in hurry