re-flash

I have a MTS2000 mdl III 800 mhz that is currently flashed 200008-000000-8 H260 250 Mode Capability (Models II & III) H38 SMARTZONE Systems Operation I need to have it re-flashed with it's ORIGINAL flash of 200004-000000-2 H260 250 Mode Capability (Models II & III) H37 SMARTNET Systems...