Atomic GB on Arc S?

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http://forum.xda-developers.com – I have an Arc S with ICS, since I upgraded to ICS the telephone are incredible slow :) I realy want to use this rom: http://forum.xda-developers.com/show....php?t=2083286 But I have never use roms/flash a phone before and thinking about follow those: Unlocked booter 1. Flash Stock .62 / .42 2. Root and install CWM 3. Download the rom and your device patch from downloads and put them in SD Card 4. Boot into recovery 5. Wipe Data/factory reset 6. Go to advanced-Wipe Dalvik Cache and go back 7. Go to Mounts and Storage-Format /System and go back 8. Flash the rom and device pat (HowTos)