DKP's advice is, as always, extremely sound. I suspect he presumes that your external hard drive was formatted as FAT32; hence the direct copy failed, and when you used Toast to transfer the original, it broke it into two files.
However, I am somewhat concerned that even if you are able to reconsistute your original hdd file, you may still not be able to boot successfully. This is because in your other thread, you mentioned problems with booting from the installation CD. This would not arise from a corrupted or incomplete hdd file. It is either because your CD itself has a scratch or other problem, or for some other, unknown reason.
So, if you continue to have problems even after putting the two hdd files together as DKP has so correctly instructed, I can try to reconstitute your disk on my machine. If you send me a private message, I will send you an ftp address, and you can upload the files to my server. I will then bring them down and try to get you a bootable HDD.
BTW, I did the data analysis for my neurophysiology dissertation with SPSS using punched cards (!!!), so I sympathize with your problem.
BTW, no charge for this.
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