Netscape 4.78 -> Thunderbird ?

I use Firefox for browsing but still use Netscape 4.78 for Windows for email since 1999. I adore this email program because:

1 It is light and simple
2 Malware / viruses are geared towards the more popular email programs "“ Microsoft made
3 The one feature I really like is that I can just take the mail files (in / sent) from my office computer on my USB. When I overwrite the mail files on my home computer or laptop I am fully up to date "“ no synchronizing etc. Just plain and simple overwriting which takes minutes.

I used Netscape 4.78 though all the incarnations of Windows but I recently bought a laptop with Windows 7 "“ and then tragedy struck as I cannot install Netscape 4.78 in Windows 7

My request for help is:

1 What program do I use to transfer the Netscape 4.78 mail files to the Windows 7 laptop
2 Is there any email program which is compatible with Netscape 4.78 mail files (I can use the same files without using import features)
3 Finally is there any email program which has the same feature of overwriting email files like Netscape 4.78. If so I may have to install that email program in all my computers

I imagine that Thunderbird may have these features but am unsure

Thanks for your help

 

Sam, you placed an identical post in the Sillydog newsgroup. I gave a lengthy reply, there.

 

I saw the answer.

Thank you - will try your suggestions