That may be the case if they are not too large but when they are large enough to actually cause the program to crash and shut down when importing them then they are still too large. NO ONE in their right mind using SGB are going to use models THAT size in their game, even if they were scaled down to half the size they are/were that would have been better.
In my defence, at the time of OP.. I was new at using SGB and had no idea there was scaling options when importing.