Try this now that you have Amon_RA 2.3. Charge your battery up......
1.)Make a nandroid backup (as you always should)
2.)Do a full wipe at least 3 times. (Factory Rest, Cache, Dalvik Cache, Data, .android_secure, Boot, System, SDext, Battery Stats)
3.)Flash the ROM and then flash the newest gapps zip.
4.)Once they're done flashing reboot the system and enjoy ICS.
After you've played around with it for a while I would suggest you restore your backup, as this ROM still has some problems to work out. I.E. camera and 4G, though if I'm not mistaken it's going to be a minute before WiMAX is working. The camera though should be fixed relatively soon, which at that point it will most likely become the ROM I use.
Hope that help you get it installed and up and running.