The file that you download, which has a *.7z extension has too be unzipped before you upload it into the Smarty. Download and install the "7-Zip File Manager" on your pc. Then use it to extract the file with the correct extension (*.Smt)" from the *.7z compressed file. Once you have the *.Smt file extracted you upload this file into your Smarty. The Smarty is looking for a file with the *.Smt extension.
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98 Ram 3500 Dually, 4x4, Quadcab. HP215 IP, 90 HP injectors, AFE Filter, Gutted AFC/No Plate, 60 lb springs, 4K GSK, Super B Special (64/14/72), 4" exhaust, Pyro/Boost Pillar, Tranny:Suncoast TC and VB, Trans-Go Shift Kit, Race clutches/steel pistons/springs