I unpacked the files (using windows) in the work folder and mounted it as the second hard drive in winuae.
Then in shell i went to work: and then ran loadmodule/loadmodule scsi.device
It is quite unpleasant to help you because you don't answer the questions and the little information you give is so unprecise that it's almost useless.
I guess you didn't preserve the directory structure when you unpacked the archives, did you?
And you completely missed the patchstrip command, didn't you? This is the most important step before loadmodule.
I need to sort this out soon coz i'm running out of space with the 170MB noisy HD that came factory installed.
This is your problem, not mine, isn't it? So why don't you put a little bit of effort into supplying the required information to help you? Or try to understand what's going on and help yourself?
Or just stay with the "keep it simple" principle. Now that you know that 4GB is the limit, you could simply stay below 4GB and all is fine. If 170 MB is what you have now and what served you for the past 10 years, 4000 MB should be overwhelmingly much and last for at least 5 or 10 years more, shouldn't it?
So if you create a 500 MB boot partition, you can install a new OS and put a backup of the old OS on it and still have more than half of the space free.
Then create a 3500 MB work partition for all the new stuff you want to install and leave the rest of the HDD alone. (Better make two 1750 MB partitions because partitions above 2GB will cause other problems you didn't even notice yet.)
All this is possible without installing patches and file systems and such. And if at some point you learn how DOS commands are entered and how the current directory and relative paths work together, you might be able to install the drivers for big harddrives without instructions. Then you can still add further partitions on the yet empty space of the HDD.
Perhaps at some point you even become interested in writing programs for AmigaOS, then you could check the developer documentation and find out yourself where the 4GB limit comes from and what is necessary to circumvent it.