Macally is generally quite forthcoming with its software. You don't mention what OS (8, 9 or X) you have in the MT, but if you cannot find something here the situation is indeed dire.
If a Macally card relies on native Apple software, some idea of the OS concerned will help your helpers, perhaps? Apple's USB Mass Storage Support extension also exists as v2.1.1 (OS 9.2.1) as well as the v1.4.1 in USB Mass Storage Extension v2.0.4, but that may be later than your need.
And then there are such (also later) software pieces as USB Device Extension v1.5.8 (in Mac OS CPU Software 4.5) ... &c., &c.
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If a Macally card relies on native Apple software, some idea of the OS concerned will help your helpers, perhaps? Apple's USB Mass Storage Support extension also exists as v2.1.1 (OS 9.2.1) as well as the v1.4.1 in USB Mass Storage Extension v2.0.4, but that may be later than your need.
And then there are such (also later) software pieces as USB Device Extension v1.5.8 (in Mac OS CPU Software 4.5) ... &c., &c.
de